215453242 has 16 divisors (see below), whose sum is σ = 325555200. Its totient is φ = 106938160.

The previous prime is 215453221. The next prime is 215453269. The reversal of 215453242 is 242354512.

It is a self number, because there is not a number n which added to its sum of digits gives 215453242.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228492 + ... + 229432.

It is an arithmetic number, because the mean of its divisors is an integer number (20347200).

Almost surely, 2^215453242 is an apocalyptic number.

215453242 is a deficient number, since it is larger than the sum of its proper divisors (110101958).

215453242 is a wasteful number, since it uses less digits than its factorization.

215453242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661.

The product of its digits is 9600, while the sum is 28.

The square root of 215453242 is about 14678.3255857063. The cubic root of 215453242 is about 599.4933148299.

The spelling of 215453242 in words is "two hundred fifteen million, four hundred fifty-three thousand, two hundred forty-two".