51612113 has 16 divisors (see below), whose sum is σ = 62355840. Its totient is φ = 41731200.

The previous prime is 51612109. The next prime is 51612133. The reversal of 51612113 is 31121615.

It is not a de Polignac number, because 51612113 - 2² = 51612109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51612103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36683 + ... + 38063.

It is an arithmetic number, because the mean of its divisors is an integer number (3897240).

Almost surely, 2^51612113 is an apocalyptic number.

It is an amenable number.

51612113 is a deficient number, since it is larger than the sum of its proper divisors (10743727).

51612113 is a wasteful number, since it uses less digits than its factorization.

51612113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688.

The product of its digits is 180, while the sum is 20.

The square root of 51612113 is about 7184.1570834719. The cubic root of 51612113 is about 372.3207263105.

Adding to 51612113 its reverse (31121615), we get a palindrome (82733728).

The spelling of 51612113 in words is "fifty-one million, six hundred twelve thousand, one hundred thirteen".