313532521 has 4 divisors (see below), whose sum is σ = 317948544. Its totient is φ = 309116500.

The previous prime is 313532519. The next prime is 313532533. The reversal of 313532521 is 125235313.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125235313 = 7 ⋅17890759.

It is a cyclic number.

It is not a de Polignac number, because 313532521 - 2¹ = 313532519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313532551) 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, 2207905 + ... + 2208046.

It is an arithmetic number, because the mean of its divisors is an integer number (79487136).

Almost surely, 2^313532521 is an apocalyptic number.

It is an amenable number.

313532521 is a deficient number, since it is larger than the sum of its proper divisors (4416023).

313532521 is an equidigital number, since it uses as much as digits as its factorization.

313532521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4416022.

The product of its digits is 2700, while the sum is 25.

The square root of 313532521 is about 17706.8495503859. The cubic root of 313532521 is about 679.3509673709.

Adding to 313532521 its reverse (125235313), we get a palindrome (438767834).

The spelling of 313532521 in words is "three hundred thirteen million, five hundred thirty-two thousand, five hundred twenty-one".