155972385 has 40 divisors (see below), whose sum is σ = 282384960. Its totient is φ = 82355616.

The previous prime is 155972363. The next prime is 155972389. The reversal of 155972385 is 583279551.

155972385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155972385 - 2⁶ = 155972321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 155972385.

It is not an unprimeable number, because it can be changed into a prime (155972389) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 39846 + ... + 43584.

It is an arithmetic number, because the mean of its divisors is an integer number (7059624).

Almost surely, 2^155972385 is an apocalyptic number.

155972385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155972385 is a deficient number, since it is larger than the sum of its proper divisors (126412575).

155972385 is a wasteful number, since it uses less digits than its factorization.

155972385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3859 (or 3850 counting only the distinct ones).

The product of its digits is 378000, while the sum is 45.

The square root of 155972385 is about 12488.8904631276. The cubic root of 155972385 is about 538.2894949291.

The spelling of 155972385 in words is "one hundred fifty-five million, nine hundred seventy-two thousand, three hundred eighty-five".