215049538142 has 4 divisors (see below), whose sum is σ = 322574307216. Its totient is φ = 107524769070.

The previous prime is 215049538111. The next prime is 215049538147. The reversal of 215049538142 is 241835940512.

215049538142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 215049538093 and 215049538102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215049538147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53762384534 + ... + 53762384537.

It is an arithmetic number, because the mean of its divisors is an integer number (80643576804).

Almost surely, 2^215049538142 is an apocalyptic number.

215049538142 is a deficient number, since it is larger than the sum of its proper divisors (107524769074).

215049538142 is a wasteful number, since it uses less digits than its factorization.

215049538142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107524769073.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 215049538142 in words is "two hundred fifteen billion, forty-nine million, five hundred thirty-eight thousand, one hundred forty-two".