31424873 has 4 divisors (see below), whose sum is σ = 32155728. Its totient is φ = 30694020.

The previous prime is 31424867. The next prime is 31424881. The reversal of 31424873 is 37842413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31424873 - 2²² = 27230569 is a prime.

It is a super-2 number, since 2×31424873² = 1975045286132258, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31427873) 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, 365363 + ... + 365448.

It is an arithmetic number, because the mean of its divisors is an integer number (8038932).

Almost surely, 2^31424873 is an apocalyptic number.

It is an amenable number.

31424873 is a deficient number, since it is larger than the sum of its proper divisors (730855).

31424873 is an equidigital number, since it uses as much as digits as its factorization.

31424873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730854.

The product of its digits is 16128, while the sum is 32.

The square root of 31424873 is about 5605.7892397057. The cubic root of 31424873 is about 315.5667063927.

The spelling of 31424873 in words is "thirty-one million, four hundred twenty-four thousand, eight hundred seventy-three".