215151530 has 32 divisors (see below), whose sum is σ = 425347200. Its totient is φ = 77705920.

The previous prime is 215151527. The next prime is 215151533. The reversal of 215151530 is 35151512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (215151527) and next prime (215151533).

It is a super-2 number, since 2×215151530² = 92580361722681800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215151496 and 215151505.

It is not an unprimeable number, because it can be changed into a prime (215151533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9827 + ... + 22953.

It is an arithmetic number, because the mean of its divisors is an integer number (13292100).

Almost surely, 2^215151530 is an apocalyptic number.

215151530 is a deficient number, since it is larger than the sum of its proper divisors (210195670).

215151530 is a wasteful number, since it uses less digits than its factorization.

215151530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13294.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 215151530 is about 14668.0445186126. The cubic root of 215151530 is about 599.2133487133.

The spelling of 215151530 in words is "two hundred fifteen million, one hundred fifty-one thousand, five hundred thirty".