400801038251 has 4 divisors (see below), whose sum is σ = 401512941192. Its totient is φ = 400089135312.

The previous prime is 400801038247. The next prime is 400801038263. The reversal of 400801038251 is 152830108004.

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

It is a cyclic number.

It is not a de Polignac number, because 400801038251 - 2² = 400801038247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400801031251) 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, 355950626 + ... + 355951751.

It is an arithmetic number, because the mean of its divisors is an integer number (100378235298).

Almost surely, 2^400801038251 is an apocalyptic number.

400801038251 is a deficient number, since it is larger than the sum of its proper divisors (711902941).

400801038251 is an equidigital number, since it uses as much as digits as its factorization.

400801038251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711902940.

The product of its (nonzero) digits is 7680, while the sum is 32.

The spelling of 400801038251 in words is "four hundred billion, eight hundred one million, thirty-eight thousand, two hundred fifty-one".