51502889 has 2 divisors, whose sum is σ = 51502890. Its totient is φ = 51502888.

The previous prime is 51502883. The next prime is 51502921. The reversal of 51502889 is 98820515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28270489 + 23232400 = 5317^2 + 4820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51502889 is a prime.

It is a Chen prime.

It is equal to p_3085778 and since 51502889 and 3085778 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51502883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25751444 + 25751445.

It is an arithmetic number, because the mean of its divisors is an integer number (25751445).

Almost surely, 2^51502889 is an apocalyptic number.

It is an amenable number.

51502889 is a deficient number, since it is larger than the sum of its proper divisors (1).

51502889 is an equidigital number, since it uses as much as digits as its factorization.

51502889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 51502889 is about 7176.5513305487. The cubic root of 51502889 is about 372.0578998982.

The spelling of 51502889 in words is "fifty-one million, five hundred two thousand, eight hundred eighty-nine".