31432117 has 4 divisors (see below), whose sum is σ = 32198796. Its totient is φ = 30665440.

The previous prime is 31432111. The next prime is 31432153. The reversal of 31432117 is 71123413.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11771761 + 19660356 = 3431^2 + 4434^2 .

It is a cyclic number.

It is not a de Polignac number, because 31432117 - 2⁷ = 31431989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31432111) 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, 383278 + ... + 383359.

It is an arithmetic number, because the mean of its divisors is an integer number (8049699).

Almost surely, 2^31432117 is an apocalyptic number.

It is an amenable number.

31432117 is a deficient number, since it is larger than the sum of its proper divisors (766679).

31432117 is an equidigital number, since it uses as much as digits as its factorization.

31432117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766678.

The product of its digits is 504, while the sum is 22.

The square root of 31432117 is about 5606.4353202369. The cubic root of 31432117 is about 315.5909524689.

The spelling of 31432117 in words is "thirty-one million, four hundred thirty-two thousand, one hundred seventeen".