2251143451631 has 4 divisors (see below), whose sum is σ = 2251164471552. Its totient is φ = 2251122431712.

The previous prime is 2251143451619. The next prime is 2251143451651. The reversal of 2251143451631 is 1361543411522.

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 2251143451631 - 2¹⁸ = 2251143189487 is a prime.

It is a super-2 number, since 2×2251143451631² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251143451651) 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, 10348490 + ... + 10563783.

It is an arithmetic number, because the mean of its divisors is an integer number (562791117888).

Almost surely, 2^{2251143451631} is an apocalyptic number.

2251143451631 is a deficient number, since it is larger than the sum of its proper divisors (21019921).

2251143451631 is a wasteful number, since it uses less digits than its factorization.

2251143451631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21019920.

The product of its digits is 86400, while the sum is 38.

The spelling of 2251143451631 in words is "two trillion, two hundred fifty-one billion, one hundred forty-three million, four hundred fifty-one thousand, six hundred thirty-one".