2631565401 has 16 divisors (see below), whose sum is σ = 3662730240. Its totient is φ = 1677448080.

The previous prime is 2631565397. The next prime is 2631565423. The reversal of 2631565401 is 1045651362.

It is not a de Polignac number, because 2631565401 - 2² = 2631565397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2631565481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223266 + ... + 234756.

It is an arithmetic number, because the mean of its divisors is an integer number (228920640).

Almost surely, 2^2631565401 is an apocalyptic number.

It is an amenable number.

2631565401 is a deficient number, since it is larger than the sum of its proper divisors (1031164839).

2631565401 is a wasteful number, since it uses less digits than its factorization.

2631565401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14836.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 2631565401 is about 51298.7855704207. The cubic root of 2631565401 is about 1380.6111906214.

The spelling of 2631565401 in words is "two billion, six hundred thirty-one million, five hundred sixty-five thousand, four hundred one".