51992725 has 6 divisors (see below), whose sum is σ = 64471010. Its totient is φ = 41594160.

The previous prime is 51992723. The next prime is 51992729. The reversal of 51992725 is 52729915.

It can be written as a sum of positive squares in 3 ways, for example, as 2304324 + 49688401 = 1518^2 + 7049^2 .

It is not a de Polignac number, because 51992725 - 2¹ = 51992723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51992723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1039830 + ... + 1039879.

Almost surely, 2^51992725 is an apocalyptic number.

It is an amenable number.

51992725 is a deficient number, since it is larger than the sum of its proper divisors (12478285).

51992725 is a wasteful number, since it uses less digits than its factorization.

51992725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079719 (or 2079714 counting only the distinct ones).

The product of its digits is 56700, while the sum is 40.

The square root of 51992725 is about 7210.5981027929. The cubic root of 51992725 is about 373.2337084477.

The spelling of 51992725 in words is "fifty-one million, nine hundred ninety-two thousand, seven hundred twenty-five".