1320650331 has 48 divisors (see below), whose sum is σ = 2377301760. Its totient is φ = 633260160.

The previous prime is 1320650311. The next prime is 1320650351. The reversal of 1320650331 is 1330560231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1320650311) and next prime (1320650351).

It is not a de Polignac number, because 1320650331 - 2⁵ = 1320650299 is a prime.

It is a super-2 number, since 2×1320650331² = 3488234593540819122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320650311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22125 + ... + 55953.

It is an arithmetic number, because the mean of its divisors is an integer number (49527120).

Almost surely, 2^1320650331 is an apocalyptic number.

1320650331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1320650331 is a deficient number, since it is larger than the sum of its proper divisors (1056651429).

1320650331 is a wasteful number, since it uses less digits than its factorization.

1320650331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33876 (or 33863 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 1320650331 is about 36340.7530329243. The cubic root of 1320650331 is about 1097.1414293810.

The spelling of 1320650331 in words is "one billion, three hundred twenty million, six hundred fifty thousand, three hundred thirty-one".