51535739 has 2 divisors, whose sum is σ = 51535740. Its totient is φ = 51535738.

The previous prime is 51535703. The next prime is 51535751. The reversal of 51535739 is 93753515.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51535739 is a prime.

It is a super-2 number, since 2×51535739² = 5311864788552242, which contains 22 as substring.

It is equal to p_3087659 and since 51535739 and 3087659 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 (51535039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25767869 + 25767870.

It is an arithmetic number, because the mean of its divisors is an integer number (25767870).

Almost surely, 2^51535739 is an apocalyptic number.

51535739 is a deficient number, since it is larger than the sum of its proper divisors (1).

51535739 is an equidigital number, since it uses as much as digits as its factorization.

51535739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70875, while the sum is 38.

The square root of 51535739 is about 7178.8396694731. The cubic root of 51535739 is about 372.1369861050.

The spelling of 51535739 in words is "fifty-one million, five hundred thirty-five thousand, seven hundred thirty-nine".