401518397 has 12 divisors (see below), whose sum is σ = 468074880. Its totient is φ = 343420056.

The previous prime is 401518379. The next prime is 401518399. The reversal of 401518397 is 793815104.

It is not a de Polignac number, because 401518397 - 2⁶ = 401518333 is a prime.

It is a super-2 number, since 2×401518397² = 322434046258899218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401518397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401518399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14918 + ... + 32024.

It is an arithmetic number, because the mean of its divisors is an integer number (39006240).

Almost surely, 2^401518397 is an apocalyptic number.

It is an amenable number.

401518397 is a deficient number, since it is larger than the sum of its proper divisors (66556483).

401518397 is a wasteful number, since it uses less digits than its factorization.

401518397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17600 (or 17593 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 401518397 is about 20037.9239693138. The cubic root of 401518397 is about 737.7374262662.

The spelling of 401518397 in words is "four hundred one million, five hundred eighteen thousand, three hundred ninety-seven".