51245131 has 6 divisors (see below), whose sum is σ = 59611740. Its totient is φ = 43924356.

The previous prime is 51245107. The next prime is 51245141. The reversal of 51245131 is 13154215.

It is a happy number.

51245131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51245131 - 2⁹ = 51244619 is a prime.

It is a super-2 number, since 2×51245131² = 5252126902414322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51245141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 522861 + ... + 522958.

It is an arithmetic number, because the mean of its divisors is an integer number (9935290).

Almost surely, 2^51245131 is an apocalyptic number.

51245131 is a deficient number, since it is larger than the sum of its proper divisors (8366609).

51245131 is a wasteful number, since it uses less digits than its factorization.

51245131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045833 (or 1045826 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 51245131 is about 7158.5704578498. The cubic root of 51245131 is about 371.4361785776.

Adding to 51245131 its reverse (13154215), we get a palindrome (64399346).

The spelling of 51245131 in words is "fifty-one million, two hundred forty-five thousand, one hundred thirty-one".