51125629 has 2 divisors, whose sum is σ = 51125630. Its totient is φ = 51125628.

The previous prime is 51125617. The next prime is 51125639. The reversal of 51125629 is 92652115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32832900 + 18292729 = 5730^2 + 4277^2 .

It is a cyclic number.

It is not a de Polignac number, because 51125629 - 2⁵ = 51125597 is a prime.

It is a super-2 number, since 2×51125629² = 5227659881291282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51125629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51125639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25562814 + 25562815.

It is an arithmetic number, because the mean of its divisors is an integer number (25562815).

Almost surely, 2^51125629 is an apocalyptic number.

It is an amenable number.

51125629 is a deficient number, since it is larger than the sum of its proper divisors (1).

51125629 is an equidigital number, since it uses as much as digits as its factorization.

51125629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 31.

The square root of 51125629 is about 7150.2188078408. The cubic root of 51125629 is about 371.1472281062.

The spelling of 51125629 in words is "fifty-one million, one hundred twenty-five thousand, six hundred twenty-nine".