51709288 has 8 divisors (see below), whose sum is σ = 96954930. Its totient is φ = 25854640.

The previous prime is 51709277. The next prime is 51709297. The reversal of 51709288 is 88290715.

It can be written as a sum of positive squares in only one way, i.e., 51581124 + 128164 = 7182^2 + 358^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 51709288.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3231823 + ... + 3231838.

Almost surely, 2^51709288 is an apocalyptic number.

It is an amenable number.

51709288 is a deficient number, since it is larger than the sum of its proper divisors (45245642).

51709288 is a wasteful number, since it uses less digits than its factorization.

51709288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6463667 (or 6463663 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 51709288 is about 7190.9170486107. The cubic root of 51709288 is about 372.5542476135.

The spelling of 51709288 in words is "fifty-one million, seven hundred nine thousand, two hundred eighty-eight".