264231520 has 72 divisors (see below), whose sum is σ = 726186384. Its totient is φ = 90590976.

The previous prime is 264231503. The next prime is 264231533. The reversal of 264231520 is 25132462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9012 + ... + 24691.

It is an arithmetic number, because the mean of its divisors is an integer number (10085922).

Almost surely, 2^264231520 is an apocalyptic number.

264231520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264231520 is an abundant number, since it is smaller than the sum of its proper divisors (461954864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

264231520 is a wasteful number, since it uses less digits than its factorization.

264231520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33732 (or 33717 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 264231520 is about 16255.1997834539. The cubic root of 264231520 is about 641.6943385679.

Adding to 264231520 its reverse (25132462), we get a palindrome (289363982).

The spelling of 264231520 in words is "two hundred sixty-four million, two hundred thirty-one thousand, five hundred twenty".