215100142 has 4 divisors (see below), whose sum is σ = 322650216. Its totient is φ = 107550070.

The previous prime is 215100107. The next prime is 215100143. The reversal of 215100142 is 241001512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215100143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53775034 + ... + 53775037.

It is an arithmetic number, because the mean of its divisors is an integer number (80662554).

Almost surely, 2^215100142 is an apocalyptic number.

215100142 is a deficient number, since it is larger than the sum of its proper divisors (107550074).

215100142 is a wasteful number, since it uses less digits than its factorization.

215100142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107550073.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 215100142 is about 14666.2927149297. The cubic root of 215100142 is about 599.1656384206.

Adding to 215100142 its reverse (241001512), we get a palindrome (456101654).

The spelling of 215100142 in words is "two hundred fifteen million, one hundred thousand, one hundred forty-two".