401967531 has 48 divisors (see below), whose sum is σ = 688896000. Its totient is φ = 225700272.

The previous prime is 401967523. The next prime is 401967539. The reversal of 401967531 is 135769104.

It is an interprime number because it is at equal distance from previous prime (401967523) and next prime (401967539).

It is not a de Polignac number, because 401967531 - 2³ = 401967523 is a prime.

It is a super-2 number, since 2×401967531² = 323155791956471922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401967539) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 181030 + ... + 183236.

It is an arithmetic number, because the mean of its divisors is an integer number (14352000).

Almost surely, 2^401967531 is an apocalyptic number.

401967531 is a deficient number, since it is larger than the sum of its proper divisors (286928469).

401967531 is a wasteful number, since it uses less digits than its factorization.

401967531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293 (or 2276 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 401967531 is about 20049.1279361472. The cubic root of 401967531 is about 738.0123987165.

The spelling of 401967531 in words is "four hundred one million, nine hundred sixty-seven thousand, five hundred thirty-one".