215413680 has 40 divisors (see below), whose sum is σ = 667783152. Its totient is φ = 57443584.

The previous prime is 215413673. The next prime is 215413739. The reversal of 215413680 is 86314512.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×215413680² = 92806107062284800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448539 + ... + 449018.

Almost surely, 2^215413680 is an apocalyptic number.

215413680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215413680 is an abundant number, since it is smaller than the sum of its proper divisors (452369472).

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

215413680 is a wasteful number, since it uses less digits than its factorization.

215413680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897573 (or 897567 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 215413680 is about 14676.9778905604. The cubic root of 215413680 is about 599.4566191551.

The spelling of 215413680 in words is "two hundred fifteen million, four hundred thirteen thousand, six hundred eighty".