51131562 has 16 divisors (see below), whose sum is σ = 102360000. Its totient is φ = 17027712.

The previous prime is 51131557. The next prime is 51131581. The reversal of 51131562 is 26513115.

It is a super-2 number, since 2×51131562² = 5228873265119688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4083 + ... + 10905.

It is an arithmetic number, because the mean of its divisors is an integer number (6397500).

Almost surely, 2^51131562 is an apocalyptic number.

51131562 is an abundant number, since it is smaller than the sum of its proper divisors (51228438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51131562 is a wasteful number, since it uses less digits than its factorization.

51131562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8077.

The product of its digits is 900, while the sum is 24.

The square root of 51131562 is about 7150.6336782134. The cubic root of 51131562 is about 371.1615844501.

Adding to 51131562 its reverse (26513115), we get a palindrome (77644677).

The spelling of 51131562 in words is "fifty-one million, one hundred thirty-one thousand, five hundred sixty-two".