215311142 has 8 divisors (see below), whose sum is σ = 337008816. Its totient is φ = 102974872.

The previous prime is 215311099. The next prime is 215311153. The reversal of 215311142 is 241113512.

215311142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2340293 + ... + 2340384.

It is an arithmetic number, because the mean of its divisors is an integer number (42126102).

Almost surely, 2^215311142 is an apocalyptic number.

215311142 is a deficient number, since it is larger than the sum of its proper divisors (121697674).

215311142 is a wasteful number, since it uses less digits than its factorization.

215311142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4680702.

The product of its digits is 240, while the sum is 20.

The square root of 215311142 is about 14673.4843169576. The cubic root of 215311142 is about 599.3614892663.

Adding to 215311142 its reverse (241113512), we get a palindrome (456424654).

The spelling of 215311142 in words is "two hundred fifteen million, three hundred eleven thousand, one hundred forty-two".