401557122 has 32 divisors (see below), whose sum is σ = 894332160. Its totient is φ = 133554960.

The previous prime is 401557111. The next prime is 401557129. The reversal of 401557122 is 221755104.

It is a super-2 number, since 2×401557122² = 322496244457845768, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (401557129) 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, 16972 + ... + 33032.

It is an arithmetic number, because the mean of its divisors is an integer number (27947880).

Almost surely, 2^401557122 is an apocalyptic number.

401557122 is an abundant number, since it is smaller than the sum of its proper divisors (492775038).

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

401557122 is a wasteful number, since it uses less digits than its factorization.

401557122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16535 (or 16529 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 401557122 is about 20038.8902387333. The cubic root of 401557122 is about 737.7611428743.

The spelling of 401557122 in words is "four hundred one million, five hundred fifty-seven thousand, one hundred twenty-two".