215388024142 has 4 divisors (see below), whose sum is σ = 323082036216. Its totient is φ = 107694012070.

The previous prime is 215388024109. The next prime is 215388024199. The reversal of 215388024142 is 241420883512.

It is a happy number.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 215388024095 and 215388024104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53847006034 + ... + 53847006037.

It is an arithmetic number, because the mean of its divisors is an integer number (80770509054).

Almost surely, 2^215388024142 is an apocalyptic number.

215388024142 is a deficient number, since it is larger than the sum of its proper divisors (107694012074).

215388024142 is a wasteful number, since it uses less digits than its factorization.

215388024142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107694012073.

The product of its (nonzero) digits is 122880, while the sum is 40.

The spelling of 215388024142 in words is "two hundred fifteen billion, three hundred eighty-eight million, twenty-four thousand, one hundred forty-two".