52155709 has 2 divisors, whose sum is σ = 52155710. Its totient is φ = 52155708.

The previous prime is 52155683. The next prime is 52155713. The reversal of 52155709 is 90755125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51523684 + 632025 = 7178^2 + 795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52155709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52155739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26077854 + 26077855.

It is an arithmetic number, because the mean of its divisors is an integer number (26077855).

Almost surely, 2^52155709 is an apocalyptic number.

It is an amenable number.

52155709 is a deficient number, since it is larger than the sum of its proper divisors (1).

52155709 is an equidigital number, since it uses as much as digits as its factorization.

52155709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 52155709 is about 7221.8909573601. The cubic root of 52155709 is about 373.6232992980.

The spelling of 52155709 in words is "fifty-two million, one hundred fifty-five thousand, seven hundred nine".