51865652 has 6 divisors (see below), whose sum is σ = 90764898. Its totient is φ = 25932824.

The previous prime is 51865591. The next prime is 51865663. The reversal of 51865652 is 25656815.

It can be written as a sum of positive squares in only one way, i.e., 46730896 + 5134756 = 6836^2 + 2266^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6483203 + ... + 6483210.

It is an arithmetic number, because the mean of its divisors is an integer number (15127483).

Almost surely, 2^51865652 is an apocalyptic number.

It is an amenable number.

51865652 is a deficient number, since it is larger than the sum of its proper divisors (38899246).

51865652 is a wasteful number, since it uses less digits than its factorization.

51865652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12966417 (or 12966415 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

The square root of 51865652 is about 7201.7811685721. The cubic root of 51865652 is about 372.9293926780.

The spelling of 51865652 in words is "fifty-one million, eight hundred sixty-five thousand, six hundred fifty-two".