51936139 has 16 divisors (see below), whose sum is σ = 60410880. Its totient is φ = 44288640.

The previous prime is 51936127. The next prime is 51936149. The reversal of 51936139 is 93163915.

It is a cyclic number.

It is not a de Polignac number, because 51936139 - 2¹³ = 51927947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51936098 and 51936107.

It is not an unprimeable number, because it can be changed into a prime (51936109) 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, 3934 + ... + 10924.

It is an arithmetic number, because the mean of its divisors is an integer number (3775680).

Almost surely, 2^51936139 is an apocalyptic number.

51936139 is a deficient number, since it is larger than the sum of its proper divisors (8474741).

51936139 is a wasteful number, since it uses less digits than its factorization.

51936139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7050.

The product of its digits is 21870, while the sum is 37.

The square root of 51936139 is about 7206.6732269474. The cubic root of 51936139 is about 373.0982570031.

The spelling of 51936139 in words is "fifty-one million, nine hundred thirty-six thousand, one hundred thirty-nine".