31201030131 has 8 divisors (see below), whose sum is σ = 41612242320. Its totient is φ = 20795252352.

The previous prime is 31201030129. The next prime is 31201030141. The reversal of 31201030131 is 13103010213.

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

It is not a de Polignac number, because 31201030131 - 2¹ = 31201030129 is a prime.

It is a super-2 number, since 2×31201030131² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31201030131.

It is not an unprimeable number, because it can be changed into a prime (31201030111) 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, 1345186 + ... + 1368183.

It is an arithmetic number, because the mean of its divisors is an integer number (5201530290).

Almost surely, 2^31201030131 is an apocalyptic number.

31201030131 is a deficient number, since it is larger than the sum of its proper divisors (10411212189).

31201030131 is a wasteful number, since it uses less digits than its factorization.

31201030131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717205.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31201030131 its reverse (13103010213), we get a palindrome (44304040344).

The spelling of 31201030131 in words is "thirty-one billion, two hundred one million, thirty thousand, one hundred thirty-one".