215253144 has 48 divisors (see below), whose sum is σ = 584878320. Its totient is φ = 71517120.

The previous prime is 215253121. The next prime is 215253149. The reversal of 215253144 is 441352512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215253149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18109 + ... + 27539.

It is an arithmetic number, because the mean of its divisors is an integer number (12184965).

Almost surely, 2^215253144 is an apocalyptic number.

215253144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

215253144 is an abundant number, since it is smaller than the sum of its proper divisors (369625176).

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

215253144 is a wasteful number, since it uses less digits than its factorization.

215253144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9760 (or 9753 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 215253144 is about 14671.5078979633. The cubic root of 215253144 is about 599.3076681015.

The spelling of 215253144 in words is "two hundred fifteen million, two hundred fifty-three thousand, one hundred forty-four".