402556351 has 4 divisors (see below), whose sum is σ = 409379400. Its totient is φ = 395733304.

The previous prime is 402556313. The next prime is 402556369. The reversal of 402556351 is 153655204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402556351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402556151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3411436 + ... + 3411553.

It is an arithmetic number, because the mean of its divisors is an integer number (102344850).

Almost surely, 2^402556351 is an apocalyptic number.

402556351 is a deficient number, since it is larger than the sum of its proper divisors (6823049).

402556351 is an equidigital number, since it uses as much as digits as its factorization.

402556351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6823048.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 402556351 is about 20063.8069916953. The cubic root of 402556351 is about 738.3725807492.

The spelling of 402556351 in words is "four hundred two million, five hundred fifty-six thousand, three hundred fifty-one".