1313825550 has 48 divisors (see below), whose sum is σ = 3399960960. Its totient is φ = 335119840.

The previous prime is 1313825549. The next prime is 1313825581. The reversal of 1313825550 is 555283131.

It is a super-2 number, since 2×1313825550² = 3452275151665605000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186960 + ... + 193859.

It is an arithmetic number, because the mean of its divisors is an integer number (70832520).

Almost surely, 2^1313825550 is an apocalyptic number.

1313825550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1313825550 is an abundant number, since it is smaller than the sum of its proper divisors (2086135410).

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

1313825550 is a wasteful number, since it uses less digits than its factorization.

1313825550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380857 (or 380852 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 1313825550 is about 36246.7315767919. The cubic root of 1313825550 is about 1095.2482496298.

The spelling of 1313825550 in words is "one billion, three hundred thirteen million, eight hundred twenty-five thousand, five hundred fifty".