155365397 has 16 divisors (see below), whose sum is σ = 185255424. Its totient is φ = 128640000.

The previous prime is 155365393. The next prime is 155365411. The reversal of 155365397 is 793563551.

It is a cyclic number.

It is not a de Polignac number, because 155365397 - 2² = 155365393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155365393) 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, 7604 + ... + 19197.

It is an arithmetic number, because the mean of its divisors is an integer number (11578464).

Almost surely, 2^155365397 is an apocalyptic number.

155365397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

155365397 is a deficient number, since it is larger than the sum of its proper divisors (29890027).

155365397 is a wasteful number, since it uses less digits than its factorization.

155365397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26860.

The product of its digits is 425250, while the sum is 44.

The square root of 155365397 is about 12464.5656562914. The cubic root of 155365397 is about 537.5903112717.

The spelling of 155365397 in words is "one hundred fifty-five million, three hundred sixty-five thousand, three hundred ninety-seven".