401231951 has 2 divisors, whose sum is σ = 401231952. Its totient is φ = 401231950.

The previous prime is 401231947. The next prime is 401232059. The reversal of 401231951 is 159132104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401231951 - 2² = 401231947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401231951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401231851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200615975 + 200615976.

It is an arithmetic number, because the mean of its divisors is an integer number (200615976).

Almost surely, 2^401231951 is an apocalyptic number.

401231951 is a deficient number, since it is larger than the sum of its proper divisors (1).

401231951 is an equidigital number, since it uses as much as digits as its factorization.

401231951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 401231951 is about 20030.7750973346. The cubic root of 401231951 is about 737.5619488707.

The spelling of 401231951 in words is "four hundred one million, two hundred thirty-one thousand, nine hundred fifty-one".