251772713 has 2 divisors, whose sum is σ = 251772714. Its totient is φ = 251772712.

The previous prime is 251772673. The next prime is 251772727. The reversal of 251772713 is 317277152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206439424 + 45333289 = 14368^2 + 6733^2 .

It is a cyclic number.

It is not a de Polignac number, because 251772713 - 2⁶ = 251772649 is a prime.

It is a super-2 number, since 2×251772713² = 126778998022760738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (251774713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125886356 + 125886357.

It is an arithmetic number, because the mean of its divisors is an integer number (125886357).

Almost surely, 2^251772713 is an apocalyptic number.

It is an amenable number.

251772713 is a deficient number, since it is larger than the sum of its proper divisors (1).

251772713 is an equidigital number, since it uses as much as digits as its factorization.

251772713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20580, while the sum is 35.

The square root of 251772713 is about 15867.3473838572. The cubic root of 251772713 is about 631.4460049703.

The spelling of 251772713 in words is "two hundred fifty-one million, seven hundred seventy-two thousand, seven hundred thirteen".