31014521 has 4 divisors (see below), whose sum is σ = 31175412. Its totient is φ = 30853632.

The previous prime is 31014509. The next prime is 31014523. The reversal of 31014521 is 12541013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12541013 = 79 ⋅158747.

It can be written as a sum of positive squares in 2 ways, for example, as 12524521 + 18490000 = 3539^2 + 4300^2 .

It is a cyclic number.

It is not a de Polignac number, because 31014521 - 2⁶ = 31014457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31014521.

It is not an unprimeable number, because it can be changed into a prime (31014523) 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, 80156 + ... + 80541.

It is an arithmetic number, because the mean of its divisors is an integer number (7793853).

Almost surely, 2^31014521 is an apocalyptic number.

It is an amenable number.

31014521 is a deficient number, since it is larger than the sum of its proper divisors (160891).

31014521 is a wasteful number, since it uses less digits than its factorization.

31014521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160890.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 31014521 is about 5569.0682344536. The cubic root of 31014521 is about 314.1871070325.

Adding to 31014521 its reverse (12541013), we get a palindrome (43555534).

The spelling of 31014521 in words is "thirty-one million, fourteen thousand, five hundred twenty-one".