404651231 has 2 divisors, whose sum is σ = 404651232. Its totient is φ = 404651230.

The previous prime is 404651197. The next prime is 404651251. The reversal of 404651231 is 132156404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404651231 - 2²⁶ = 337542367 is a prime.

It is a super-2 number, since 2×404651231² = 327485237499630722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404651231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404651251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202325615 + 202325616.

It is an arithmetic number, because the mean of its divisors is an integer number (202325616).

Almost surely, 2^404651231 is an apocalyptic number.

404651231 is a deficient number, since it is larger than the sum of its proper divisors (1).

404651231 is an equidigital number, since it uses as much as digits as its factorization.

404651231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 404651231 is about 20115.9446956885. The cubic root of 404651231 is about 739.6511814739.

The spelling of 404651231 in words is "four hundred four million, six hundred fifty-one thousand, two hundred thirty-one".