155221340032 has 96 divisors (see below), whose sum is σ = 342347506200. Its totient is φ = 70046592000.

The previous prime is 155221340011. The next prime is 155221340033. The reversal of 155221340032 is 230043122551.

It is a super-2 number, since 2×155221340032² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155221340033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2116782 + ... + 2188882.

Almost surely, 2^155221340032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155221340032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171173753100).

155221340032 is an abundant number, since it is smaller than the sum of its proper divisors (187126166168).

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

155221340032 is a wasteful number, since it uses less digits than its factorization.

155221340032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72276 (or 72253 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 155221340032 its reverse (230043122551), we get a palindrome (385264462583).

The spelling of 155221340032 in words is "one hundred fifty-five billion, two hundred twenty-one million, three hundred forty thousand, thirty-two".