1320531564 has 36 divisors (see below), whose sum is σ = 3386821592. Its totient is φ = 400160640.

The previous prime is 1320531547. The next prime is 1320531571. The reversal of 1320531564 is 4651350231.

It is a super-2 number, since 2×1320531564² = 3487607223040572192, which contains 22 as substring.

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, 453277 + ... + 456180.

Almost surely, 2^1320531564 is an apocalyptic number.

It is an amenable number.

1320531564 is an abundant number, since it is smaller than the sum of its proper divisors (2066290028).

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

1320531564 is a wasteful number, since it uses less digits than its factorization.

1320531564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909486 (or 909473 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1320531564 is about 36339.1189216249. The cubic root of 1320531564 is about 1097.1085394985.

Adding to 1320531564 its reverse (4651350231), we get a palindrome (5971881795).

The spelling of 1320531564 in words is "one billion, three hundred twenty million, five hundred thirty-one thousand, five hundred sixty-four".