401055531 has 12 divisors (see below), whose sum is σ = 559003368. Its totient is φ = 255744544.

The previous prime is 401055511. The next prime is 401055533. The reversal of 401055531 is 135550104.

It is not a de Polignac number, because 401055531 - 2¹¹ = 401053483 is a prime.

It is a super-2 number, since 2×401055531² = 321691077891383922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401055533) 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, 124770 + ... + 127943.

It is an arithmetic number, because the mean of its divisors is an integer number (46583614).

Almost surely, 2^401055531 is an apocalyptic number.

401055531 is a deficient number, since it is larger than the sum of its proper divisors (157947837).

401055531 is a wasteful number, since it uses less digits than its factorization.

401055531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252762 (or 252739 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 401055531 is about 20026.3708894048. The cubic root of 401055531 is about 737.4538320616.

The spelling of 401055531 in words is "four hundred one million, fifty-five thousand, five hundred thirty-one".