2251051131 has 24 divisors (see below), whose sum is σ = 3550616640. Its totient is φ = 1264508112.

The previous prime is 2251051129. The next prime is 2251051169. The reversal of 2251051131 is 1311501522.

It is not a de Polignac number, because 2251051131 - 2¹ = 2251051129 is a prime.

It is a super-2 number, since 2×2251051131² = 10134462388752758322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 2251051098 and 2251051107.

It is not an unprimeable number, because it can be changed into a prime (2251051111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121101 + ... + 138446.

It is an arithmetic number, because the mean of its divisors is an integer number (147942360).

Almost surely, 2^2251051131 is an apocalyptic number.

2251051131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2251051131 is a deficient number, since it is larger than the sum of its proper divisors (1299565509).

2251051131 is a wasteful number, since it uses less digits than its factorization.

2251051131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259623 (or 259616 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 2251051131 is about 47445.2435023786. The cubic root of 2251051131 is about 1310.5747203383.

Adding to 2251051131 its reverse (1311501522), we get a palindrome (3562552653).

The spelling of 2251051131 in words is "two billion, two hundred fifty-one million, fifty-one thousand, one hundred thirty-one".