253215973 has 2 divisors, whose sum is σ = 253215974. Its totient is φ = 253215972.

The previous prime is 253215971. The next prime is 253215979. The reversal of 253215973 is 379512352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220760164 + 32455809 = 14858^2 + 5697^2 .

It is a cyclic number.

It is not a de Polignac number, because 253215973 - 2¹ = 253215971 is a prime.

Together with 253215971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253215971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126607986 + 126607987.

It is an arithmetic number, because the mean of its divisors is an integer number (126607987).

Almost surely, 2^253215973 is an apocalyptic number.

It is an amenable number.

253215973 is a deficient number, since it is larger than the sum of its proper divisors (1).

253215973 is an equidigital number, since it uses as much as digits as its factorization.

253215973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 37.

The square root of 253215973 is about 15912.7613254268. The cubic root of 253215973 is about 632.6502722203.

The spelling of 253215973 in words is "two hundred fifty-three million, two hundred fifteen thousand, nine hundred seventy-three".