51227131 has 4 divisors (see below), whose sum is σ = 51246064. Its totient is φ = 51208200.

The previous prime is 51227123. The next prime is 51227149. The reversal of 51227131 is 13172215.

It is a happy number.

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 51227131 - 2³ = 51227123 is a prime.

It is a super-2 number, since 2×51227131² = 5248437900982322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51227161) 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, 4560 + ... + 11101.

It is an arithmetic number, because the mean of its divisors is an integer number (12811516).

Almost surely, 2^51227131 is an apocalyptic number.

51227131 is a deficient number, since it is larger than the sum of its proper divisors (18933).

51227131 is a wasteful number, since it uses less digits than its factorization.

51227131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18932.

The product of its digits is 420, while the sum is 22.

The square root of 51227131 is about 7157.3131131731. The cubic root of 51227131 is about 371.3926841419.

Adding to 51227131 its reverse (13172215), we get a palindrome (64399346).

The spelling of 51227131 in words is "fifty-one million, two hundred twenty-seven thousand, one hundred thirty-one".