215157030 has 64 divisors (see below), whose sum is σ = 565221888. Its totient is φ = 51983360.

The previous prime is 215157029. The next prime is 215157037. The reversal of 215157030 is 30751512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215157037) 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, 115567 + ... + 117413.

It is an arithmetic number, because the mean of its divisors is an integer number (8831592).

Almost surely, 2^215157030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215157030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282610944).

215157030 is an abundant number, since it is smaller than the sum of its proper divisors (350064858).

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

215157030 is a wasteful number, since it uses less digits than its factorization.

215157030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 215157030 is about 14668.2319998015. The cubic root of 215157030 is about 599.2184546423.

The spelling of 215157030 in words is "two hundred fifteen million, one hundred fifty-seven thousand, thirty".