51392464 has 10 divisors (see below), whose sum is σ = 99572930. Its totient is φ = 25696224.

The previous prime is 51392461. The next prime is 51392477. The reversal of 51392464 is 46429315.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40449600 + 10942864 = 6360^2 + 3308^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51392461) 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 as a sum of consecutive naturals, namely, 1605999 + ... + 1606030.

It is an arithmetic number, because the mean of its divisors is an integer number (9957293).

Almost surely, 2^51392464 is an apocalyptic number.

It is an amenable number.

51392464 is a deficient number, since it is larger than the sum of its proper divisors (48180466).

51392464 is a wasteful number, since it uses less digits than its factorization.

51392464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212037 (or 3212031 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 51392464 is about 7168.8537438003. The cubic root of 51392464 is about 371.7918054979.

The spelling of 51392464 in words is "fifty-one million, three hundred ninety-two thousand, four hundred sixty-four".