402557951 has 2 divisors, whose sum is σ = 402557952. Its totient is φ = 402557950.

The previous prime is 402557917. The next prime is 402557957. The reversal of 402557951 is 159755204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402557951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402557957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201278975 + 201278976.

It is an arithmetic number, because the mean of its divisors is an integer number (201278976).

Almost surely, 2^402557951 is an apocalyptic number.

402557951 is a deficient number, since it is larger than the sum of its proper divisors (1).

402557951 is an equidigital number, since it uses as much as digits as its factorization.

402557951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 38.

The square root of 402557951 is about 20063.8468644475. The cubic root of 402557951 is about 738.3735589929.

The spelling of 402557951 in words is "four hundred two million, five hundred fifty-seven thousand, nine hundred fifty-one".