31096213 has 8 divisors (see below), whose sum is σ = 33547608. Its totient is φ = 28713984.

The previous prime is 31096211. The next prime is 31096279. The reversal of 31096213 is 31269013.

It can be written as a sum of positive squares in 4 ways, for example, as 18301284 + 12794929 = 4278^2 + 3577^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31096213 - 2¹ = 31096211 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 (31096211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16356 + ... + 18157.

It is an arithmetic number, because the mean of its divisors is an integer number (4193451).

Almost surely, 2^31096213 is an apocalyptic number.

It is an amenable number.

31096213 is a deficient number, since it is larger than the sum of its proper divisors (2451395).

31096213 is a wasteful number, since it uses less digits than its factorization.

31096213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34583.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 31096213 is about 5576.3978516602. The cubic root of 31096213 is about 314.4627206274.

The spelling of 31096213 in words is "thirty-one million, ninety-six thousand, two hundred thirteen".