155224032 has 96 divisors (see below), whose sum is σ = 422301600. Its totient is φ = 49889280.

The previous prime is 155224021. The next prime is 155224039. The reversal of 155224032 is 230422551.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×155224032² = 48189000220674048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 155223993 and 155224011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155224039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444594 + ... + 444942.

It is an arithmetic number, because the mean of its divisors is an integer number (4398975).

Almost surely, 2^155224032 is an apocalyptic number.

155224032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155224032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211150800).

155224032 is an abundant number, since it is smaller than the sum of its proper divisors (267077568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155224032 is a wasteful number, since it uses less digits than its factorization.

155224032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 155224032 is about 12458.8936908539. The cubic root of 155224032 is about 537.4272129309.

Adding to 155224032 its reverse (230422551), we get a palindrome (385646583).

The spelling of 155224032 in words is "one hundred fifty-five million, two hundred twenty-four thousand, thirty-two".