31383101 has 4 divisors (see below), whose sum is σ = 31467612. Its totient is φ = 31298592.

The previous prime is 31383083. The next prime is 31383161. The reversal of 31383101 is 10138313.

It is a happy number.

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 22080601 + 9302500 = 4699^2 + 3050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31383101 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 (31383161) 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, 41696 + ... + 42441.

It is an arithmetic number, because the mean of its divisors is an integer number (7866903).

Almost surely, 2^31383101 is an apocalyptic number.

It is an amenable number.

31383101 is a deficient number, since it is larger than the sum of its proper divisors (84511).

31383101 is an equidigital number, since it uses as much as digits as its factorization.

31383101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84510.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 31383101 is about 5602.0622095796. The cubic root of 31383101 is about 315.4268204123.

The spelling of 31383101 in words is "thirty-one million, three hundred eighty-three thousand, one hundred one".