215012422 has 8 divisors (see below), whose sum is σ = 324190296. Its totient is φ = 106948992.

The previous prime is 215012407. The next prime is 215012423. The reversal of 215012422 is 224210512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×215012422² = 92460683228612168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215012422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215012423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278128 + ... + 278899.

It is an arithmetic number, because the mean of its divisors is an integer number (40523787).

Almost surely, 2^215012422 is an apocalyptic number.

215012422 is a deficient number, since it is larger than the sum of its proper divisors (109177874).

215012422 is a wasteful number, since it uses less digits than its factorization.

215012422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557222.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 215012422 is about 14663.3018791812. The cubic root of 215012422 is about 599.0841787562.

Adding to 215012422 its reverse (224210512), we get a palindrome (439222934).

The spelling of 215012422 in words is "two hundred fifteen million, twelve thousand, four hundred twenty-two".