715552421 has 2 divisors, whose sum is σ = 715552422. Its totient is φ = 715552420.

The previous prime is 715552391. The next prime is 715552427. The reversal of 715552421 is 124255517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 679384225 + 36168196 = 26065^2 + 6014^2 .

It is a cyclic number.

It is not a de Polignac number, because 715552421 - 2²⁶ = 648443557 is a prime.

It is a super-2 number, since 2×715552421² = 1024030534397922482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (715552427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357776210 + 357776211.

It is an arithmetic number, because the mean of its divisors is an integer number (357776211).

Almost surely, 2^715552421 is an apocalyptic number.

It is an amenable number.

715552421 is a deficient number, since it is larger than the sum of its proper divisors (1).

715552421 is an equidigital number, since it uses as much as digits as its factorization.

715552421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14000, while the sum is 32.

The square root of 715552421 is about 26749.8116068132. The cubic root of 715552421 is about 894.4316360612.

The spelling of 715552421 in words is "seven hundred fifteen million, five hundred fifty-two thousand, four hundred twenty-one".