31464521 has 4 divisors (see below), whose sum is σ = 34324944. Its totient is φ = 28604100.

The previous prime is 31464509. The next prime is 31464547. The reversal of 31464521 is 12546413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31464521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31464571) 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, 1430195 + ... + 1430216.

It is an arithmetic number, because the mean of its divisors is an integer number (8581236).

Almost surely, 2^31464521 is an apocalyptic number.

It is an amenable number.

31464521 is a deficient number, since it is larger than the sum of its proper divisors (2860423).

31464521 is a wasteful number, since it uses less digits than its factorization.

31464521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860422.

The product of its digits is 2880, while the sum is 26.

The square root of 31464521 is about 5609.3244691317. The cubic root of 31464521 is about 315.6993649040.

It can be divided in two parts, 3146 and 4521, that added together give a palindrome (7667).

The spelling of 31464521 in words is "thirty-one million, four hundred sixty-four thousand, five hundred twenty-one".