397525151 has 4 divisors (see below), whose sum is σ = 408269112. Its totient is φ = 386781192.

The previous prime is 397525129. The next prime is 397525157. The reversal of 397525151 is 151525793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397525151 - 2²⁶ = 330416287 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 (397525157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5371925 + ... + 5371998.

It is an arithmetic number, because the mean of its divisors is an integer number (102067278).

Almost surely, 2^397525151 is an apocalyptic number.

397525151 is a deficient number, since it is larger than the sum of its proper divisors (10743961).

397525151 is a wasteful number, since it uses less digits than its factorization.

397525151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10743960.

The product of its digits is 47250, while the sum is 38.

The square root of 397525151 is about 19938.0327765805. The cubic root of 397525151 is about 735.2835847104.

The spelling of 397525151 in words is "three hundred ninety-seven million, five hundred twenty-five thousand, one hundred fifty-one".