715981251 has 4 divisors (see below), whose sum is σ = 954641672. Its totient is φ = 477320832.

The previous prime is 715981241. The next prime is 715981289. The reversal of 715981251 is 152189517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152189517 = 3 ⋅50729839.

It is not a de Polignac number, because 715981251 - 2¹⁸ = 715719107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (715981241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119330206 + ... + 119330211.

It is an arithmetic number, because the mean of its divisors is an integer number (238660418).

Almost surely, 2^715981251 is an apocalyptic number.

715981251 is a deficient number, since it is larger than the sum of its proper divisors (238660421).

715981251 is a wasteful number, since it uses less digits than its factorization.

715981251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238660420.

The product of its digits is 25200, while the sum is 39.

The square root of 715981251 is about 26757.8259767119. The cubic root of 715981251 is about 894.6102777700.

It can be divided in two parts, 7159 and 81251, that added together give a triangular number (88410 = T₄₂₀).

The spelling of 715981251 in words is "seven hundred fifteen million, nine hundred eighty-one thousand, two hundred fifty-one".