400252553 has 4 divisors (see below), whose sum is σ = 403308048. Its totient is φ = 397197060.

The previous prime is 400252549. The next prime is 400252609. The reversal of 400252553 is 355252004.

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 a cyclic number.

It is not a de Polignac number, because 400252553 - 2² = 400252549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400252753) 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, 1527551 + ... + 1527812.

It is an arithmetic number, because the mean of its divisors is an integer number (100827012).

Almost surely, 2^400252553 is an apocalyptic number.

It is an amenable number.

400252553 is a deficient number, since it is larger than the sum of its proper divisors (3055495).

400252553 is a wasteful number, since it uses less digits than its factorization.

400252553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055494.

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 400252553 is about 20006.3128287048. The cubic root of 400252553 is about 736.9613359714.

The spelling of 400252553 in words is "four hundred million, two hundred fifty-two thousand, five hundred fifty-three".