425156731 has 4 divisors (see below), whose sum is σ = 426981672. Its totient is φ = 423331792.

The previous prime is 425156671. The next prime is 425156759. The reversal of 425156731 is 137651524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425156731 is a prime.

It is a super-2 number, since 2×425156731² = 361516491829212722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425156131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912121 + ... + 912586.

It is an arithmetic number, because the mean of its divisors is an integer number (106745418).

Almost surely, 2^425156731 is an apocalyptic number.

425156731 is a deficient number, since it is larger than the sum of its proper divisors (1824941).

425156731 is a wasteful number, since it uses less digits than its factorization.

425156731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824940.

The product of its digits is 25200, while the sum is 34.

The square root of 425156731 is about 20619.3290627993. The cubic root of 425156731 is about 751.9397085311.

The spelling of 425156731 in words is "four hundred twenty-five million, one hundred fifty-six thousand, seven hundred thirty-one".