1313521290 has 48 divisors (see below), whose sum is σ = 3430522368. Its totient is φ = 348696288.

The previous prime is 1313521289. The next prime is 1313521291. The reversal of 1313521290 is 921253131.

1313521290 is a `hidden beast` number, since 131 + 3 + 521 + 2 + 9 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1313521289) and next prime (1313521291).

It is not an unprimeable number, because it can be changed into a prime (1313521291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12654 + ... + 52793.

It is an arithmetic number, because the mean of its divisors is an integer number (71469216).

Almost surely, 2^1313521290 is an apocalyptic number.

1313521290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1313521290 is an abundant number, since it is smaller than the sum of its proper divisors (2117001078).

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

1313521290 is a wasteful number, since it uses less digits than its factorization.

1313521290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65683 (or 65680 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 1313521290 is about 36242.5342656939. The cubic root of 1313521290 is about 1095.1636960501.

The spelling of 1313521290 in words is "one billion, three hundred thirteen million, five hundred twenty-one thousand, two hundred ninety".