51629739 has 16 divisors (see below), whose sum is σ = 79672320. Its totient is φ = 29128320.

The previous prime is 51629693. The next prime is 51629741. The reversal of 51629739 is 93792615.

It is not a de Polignac number, because 51629739 - 2¹² = 51625643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51629739.

It is not an unprimeable number, because it can be changed into a prime (51629749) 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, 13902 + ... + 17219.

It is an arithmetic number, because the mean of its divisors is an integer number (4979520).

Almost surely, 2^51629739 is an apocalyptic number.

51629739 is a deficient number, since it is larger than the sum of its proper divisors (28042581).

51629739 is a wasteful number, since it uses less digits than its factorization.

51629739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31210.

The product of its digits is 102060, while the sum is 42.

The square root of 51629739 is about 7185.3837058295. The cubic root of 51629739 is about 372.3631051103.

The spelling of 51629739 in words is "fifty-one million, six hundred twenty-nine thousand, seven hundred thirty-nine".