51802501 has 2 divisors, whose sum is σ = 51802502. Its totient is φ = 51802500.

The previous prime is 51802489. The next prime is 51802537. The reversal of 51802501 is 10520815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43956900 + 7845601 = 6630^2 + 2801^2 .

It is a cyclic number.

It is not a de Polignac number, because 51802501 - 2⁵ = 51802469 is a prime.

It is a Chen prime.

It is equal to p_3102709 and since 51802501 and 3102709 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51802001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25901250 + 25901251.

It is an arithmetic number, because the mean of its divisors is an integer number (25901251).

Almost surely, 2^51802501 is an apocalyptic number.

It is an amenable number.

51802501 is a deficient number, since it is larger than the sum of its proper divisors (1).

51802501 is an equidigital number, since it uses as much as digits as its factorization.

51802501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 51802501 is about 7197.3954316822. The cubic root of 51802501 is about 372.7779730772. Note that the first 3 decimals are identical.

The spelling of 51802501 in words is "fifty-one million, eight hundred two thousand, five hundred one".