320525431 has 4 divisors (see below), whose sum is σ = 320841000. Its totient is φ = 320209864.

The previous prime is 320525417. The next prime is 320525449. The reversal of 320525431 is 134525023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320525431 is a prime.

It is a super-2 number, since 2×320525431² = 205473103835471522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320525396 and 320525405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320525411) 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, 156256 + ... + 158293.

It is an arithmetic number, because the mean of its divisors is an integer number (80210250).

Almost surely, 2^320525431 is an apocalyptic number.

320525431 is a deficient number, since it is larger than the sum of its proper divisors (315569).

320525431 is a wasteful number, since it uses less digits than its factorization.

320525431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315568.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 320525431 is about 17903.2240392618. The cubic root of 320525431 is about 684.3645382803.

The spelling of 320525431 in words is "three hundred twenty million, five hundred twenty-five thousand, four hundred thirty-one".