215500142 has 16 divisors (see below), whose sum is σ = 379762992. Its totient is φ = 90419520.

The previous prime is 215500139. The next prime is 215500157. The reversal of 215500142 is 241005512.

215500142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215500142² = 92880622404040328, which contains 22 as substring.

It is a congruent number.

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, 376463 + ... + 377034.

It is an arithmetic number, because the mean of its divisors is an integer number (23735187).

Almost surely, 2^215500142 is an apocalyptic number.

215500142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

215500142 is a deficient number, since it is larger than the sum of its proper divisors (164262850).

215500142 is a wasteful number, since it uses less digits than its factorization.

215500142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753523.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 215500142 is about 14679.9230924416. The cubic root of 215500142 is about 599.5368110372.

Adding to 215500142 its reverse (241005512), we get a palindrome (456505654).

The spelling of 215500142 in words is "two hundred fifteen million, five hundred thousand, one hundred forty-two".