215415142 has 4 divisors (see below), whose sum is σ = 323122716. Its totient is φ = 107707570.

The previous prime is 215415133. The next prime is 215415157. The reversal of 215415142 is 241514512.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53853784 + ... + 53853787.

It is an arithmetic number, because the mean of its divisors is an integer number (80780679).

Almost surely, 2^215415142 is an apocalyptic number.

215415142 is a deficient number, since it is larger than the sum of its proper divisors (107707574).

215415142 is a wasteful number, since it uses less digits than its factorization.

215415142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107707573.

The product of its digits is 1600, while the sum is 25.

The square root of 215415142 is about 14677.0276963696. The cubic root of 215415142 is about 599.4579753110.

Adding to 215415142 its reverse (241514512), we get a palindrome (456929654).

The spelling of 215415142 in words is "two hundred fifteen million, four hundred fifteen thousand, one hundred forty-two".