307431 has 6 divisors (see below), whose sum is σ = 444080. Its totient is φ = 204948.

The previous prime is 307423. The next prime is 307451. The reversal of 307431 is 134703.

It is not a de Polignac number, because 307431 - 2³ = 307423 is a prime.

It is a super-2 number, since 2×307431² = 189027639522, which contains 22 as substring.

It is a Duffinian number.

307431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17071 + ... + 17088.

2³⁰⁷⁴³¹ is an apocalyptic number.

307431 is a deficient number, since it is larger than the sum of its proper divisors (136649).

307431 is a wasteful number, since it uses less digits than its factorization.

307431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34165 (or 34162 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 307431 is about 554.4646066252. The cubic root of 307431 is about 67.4915215688.

The spelling of 307431 in words is "three hundred seven thousand, four hundred thirty-one".