215277480 has 128 divisors (see below), whose sum is σ = 782870400. Its totient is φ = 52185600.

The previous prime is 215277457. The next prime is 215277481. The reversal of 215277480 is 84772512.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215277481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2820 + ... + 20940.

It is an arithmetic number, because the mean of its divisors is an integer number (6116175).

Almost surely, 2^215277480 is an apocalyptic number.

215277480 is a gapful number since it is divisible by the number (20) 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 215277480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391435200).

215277480 is an abundant number, since it is smaller than the sum of its proper divisors (567592920).

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

215277480 is a wasteful number, since it uses less digits than its factorization.

215277480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18152 (or 18142 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 215277480 is about 14672.3372371276. The cubic root of 215277480 is about 599.3302526757.

The spelling of 215277480 in words is "two hundred fifteen million, two hundred seventy-seven thousand, four hundred eighty".