252156691 has 2 divisors, whose sum is σ = 252156692. Its totient is φ = 252156690.

The previous prime is 252156649. The next prime is 252156719. The reversal of 252156691 is 196651252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252156691 - 2¹³ = 252148499 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252156691.

It is not a weakly prime, because it can be changed into another prime (252156991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126078345 + 126078346.

It is an arithmetic number, because the mean of its divisors is an integer number (126078346).

Almost surely, 2^252156691 is an apocalyptic number.

252156691 is a deficient number, since it is larger than the sum of its proper divisors (1).

252156691 is an equidigital number, since it uses as much as digits as its factorization.

252156691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 37.

The square root of 252156691 is about 15879.4424020493. The cubic root of 252156691 is about 631.7668475488.

The spelling of 252156691 in words is "two hundred fifty-two million, one hundred fifty-six thousand, six hundred ninety-one".