402056553 has 4 divisors (see below), whose sum is σ = 536075408. Its totient is φ = 268037700.

The previous prime is 402056539. The next prime is 402056581. The reversal of 402056553 is 355650204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 402056553 - 2⁸ = 402056297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402056553.

It is not an unprimeable number, because it can be changed into a prime (402056513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67009423 + ... + 67009428.

It is an arithmetic number, because the mean of its divisors is an integer number (134018852).

Almost surely, 2^402056553 is an apocalyptic number.

It is an amenable number.

402056553 is a deficient number, since it is larger than the sum of its proper divisors (134018855).

402056553 is a wasteful number, since it uses less digits than its factorization.

402056553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134018854.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 402056553 is about 20051.3479098040. The cubic root of 402056553 is about 738.0668761599.

The spelling of 402056553 in words is "four hundred two million, fifty-six thousand, five hundred fifty-three".