252215421751 has 2 divisors, whose sum is σ = 252215421752. Its totient is φ = 252215421750.

The previous prime is 252215421697. The next prime is 252215421767. The reversal of 252215421751 is 157124512252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252215421751 is a prime.

It is a super-2 number, since 2×252215421751² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 252215421751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252215422751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126107710875 + 126107710876.

It is an arithmetic number, because the mean of its divisors is an integer number (126107710876).

Almost surely, 2^252215421751 is an apocalyptic number.

252215421751 is a deficient number, since it is larger than the sum of its proper divisors (1).

252215421751 is an equidigital number, since it uses as much as digits as its factorization.

252215421751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56000, while the sum is 37.

The spelling of 252215421751 in words is "two hundred fifty-two billion, two hundred fifteen million, four hundred twenty-one thousand, seven hundred fifty-one".