51535369 has 2 divisors, whose sum is σ = 51535370. Its totient is φ = 51535368.

The previous prime is 51535357. The next prime is 51535409. The reversal of 51535369 is 96353515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50126400 + 1408969 = 7080^2 + 1187^2 .

It is a cyclic number.

It is not a de Polignac number, because 51535369 - 2²¹ = 49438217 is a prime.

It is a super-2 number, since 2×51535369² = 5311788515932322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51533369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25767684 + 25767685.

It is an arithmetic number, because the mean of its divisors is an integer number (25767685).

Almost surely, 2^51535369 is an apocalyptic number.

It is an amenable number.

51535369 is a deficient number, since it is larger than the sum of its proper divisors (1).

51535369 is an equidigital number, since it uses as much as digits as its factorization.

51535369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60750, while the sum is 37.

The square root of 51535369 is about 7178.8138992455. The cubic root of 51535369 is about 372.1360955191.

The spelling of 51535369 in words is "fifty-one million, five hundred thirty-five thousand, three hundred sixty-nine".