155320416 has 120 divisors (see below), whose sum is σ = 471772224. Its totient is φ = 50077440.

The previous prime is 155320409. The next prime is 155320441. The reversal of 155320416 is 614023551.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 155320416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 79386 + ... + 81318.

Almost surely, 2^155320416 is an apocalyptic number.

155320416 is a gapful number since it is divisible by the number (16) 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 155320416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235886112).

155320416 is an abundant number, since it is smaller than the sum of its proper divisors (316451808).

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

155320416 is a wasteful number, since it uses less digits than its factorization.

155320416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986 (or 1969 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 155320416 is about 12462.7611707839. The cubic root of 155320416 is about 537.5384256647.

Adding to 155320416 its reverse (614023551), we get a palindrome (769343967).

The spelling of 155320416 in words is "one hundred fifty-five million, three hundred twenty thousand, four hundred sixteen".