65456431 has 4 divisors (see below), whose sum is σ = 66691512. Its totient is φ = 64221352.

The previous prime is 65456423. The next prime is 65456467. The reversal of 65456431 is 13465456.

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

It is a cyclic number.

It is not a de Polignac number, because 65456431 - 2³ = 65456423 is a prime.

It is a super-2 number, since 2×65456431² = 8569088718515522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65456231) 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, 617461 + ... + 617566.

It is an arithmetic number, because the mean of its divisors is an integer number (16672878).

Almost surely, 2^65456431 is an apocalyptic number.

65456431 is a deficient number, since it is larger than the sum of its proper divisors (1235081).

65456431 is a wasteful number, since it uses less digits than its factorization.

65456431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235080.

The product of its digits is 43200, while the sum is 34.

The square root of 65456431 is about 8090.5148785476. The cubic root of 65456431 is about 403.0115014974.

The spelling of 65456431 in words is "sixty-five million, four hundred fifty-six thousand, four hundred thirty-one".