401957431 has 2 divisors, whose sum is σ = 401957432. Its totient is φ = 401957430.

The previous prime is 401957389. The next prime is 401957443. The reversal of 401957431 is 134759104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401957431 - 2¹³ = 401949239 is a prime.

It is a super-2 number, since 2×401957431² = 323139552672239522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401957461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200978715 + 200978716.

It is an arithmetic number, because the mean of its divisors is an integer number (200978716).

Almost surely, 2^401957431 is an apocalyptic number.

401957431 is a deficient number, since it is larger than the sum of its proper divisors (1).

401957431 is an equidigital number, since it uses as much as digits as its factorization.

401957431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 401957431 is about 20048.8760532854. The cubic root of 401957431 is about 738.0062174646.

The spelling of 401957431 in words is "four hundred one million, nine hundred fifty-seven thousand, four hundred thirty-one".