725242031 has 2 divisors, whose sum is σ = 725242032. Its totient is φ = 725242030.

The previous prime is 725242019. The next prime is 725242039. The reversal of 725242031 is 130242527.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 725242031 - 2¹⁴ = 725225647 is a prime.

It is a super-2 number, since 2×725242031² = 1051952007058009922, 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 (725242039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362621015 + 362621016.

It is an arithmetic number, because the mean of its divisors is an integer number (362621016).

Almost surely, 2^725242031 is an apocalyptic number.

725242031 is a deficient number, since it is larger than the sum of its proper divisors (1).

725242031 is an equidigital number, since it uses as much as digits as its factorization.

725242031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 725242031 is about 26930.3180634763. The cubic root of 725242031 is about 898.4508456973.

Adding to 725242031 its reverse (130242527), we get a palindrome (855484558).

The spelling of 725242031 in words is "seven hundred twenty-five million, two hundred forty-two thousand, thirty-one".