51392949 has 16 divisors (see below), whose sum is σ = 70954752. Its totient is φ = 33067008.

The previous prime is 51392923. The next prime is 51392977. The reversal of 51392949 is 94929315.

It is not a de Polignac number, because 51392949 - 2¹³ = 51384757 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51392949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51392449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7797 + ... + 12789.

It is an arithmetic number, because the mean of its divisors is an integer number (4434672).

Almost surely, 2^51392949 is an apocalyptic number.

It is an amenable number.

51392949 is a deficient number, since it is larger than the sum of its proper divisors (19561803).

51392949 is a wasteful number, since it uses less digits than its factorization.

51392949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116.

The product of its digits is 87480, while the sum is 42.

The square root of 51392949 is about 7168.8875706068. The cubic root of 51392949 is about 371.7929750498.

The spelling of 51392949 in words is "fifty-one million, three hundred ninety-two thousand, nine hundred forty-nine".