1325315520 has 140 divisors (see below), whose sum is σ = 4714472664. Its totient is φ = 353410560.

The previous prime is 1325315449. The next prime is 1325315533. The reversal of 1325315520 is 255135231.

It is a happy number.

1325315520 is a `hidden beast` number, since 1 + 325 + 315 + 5 + 20 = 666.

It is a super-2 number, since 2×1325315520² = 3512922455105740800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 355 + ... + 51485.

Almost surely, 2^1325315520 is an apocalyptic number.

1325315520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1325315520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2357236332).

1325315520 is an abundant number, since it is smaller than the sum of its proper divisors (3389157144).

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

1325315520 is an equidigital number, since it uses as much as digits as its factorization.

1325315520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51160 (or 51141 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1325315520 is about 36404.8831889350. The cubic root of 1325315520 is about 1098.4317929075.

The spelling of 1325315520 in words is "one billion, three hundred twenty-five million, three hundred fifteen thousand, five hundred twenty".