215351542 has 16 divisors (see below), whose sum is σ = 369869472. Its totient is φ = 92119680.

The previous prime is 215351537. The next prime is 215351569. The reversal of 215351542 is 245153512.

It is a self number, because there is not a number n which added to its sum of digits gives 215351542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6643 + ... + 21790.

It is an arithmetic number, because the mean of its divisors is an integer number (23116842).

Almost surely, 2^215351542 is an apocalyptic number.

215351542 is a deficient number, since it is larger than the sum of its proper divisors (154517930).

215351542 is a wasteful number, since it uses less digits than its factorization.

215351542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28983.

The product of its digits is 6000, while the sum is 28.

The square root of 215351542 is about 14674.8608852009. The cubic root of 215351542 is about 599.3989740733.

The spelling of 215351542 in words is "two hundred fifteen million, three hundred fifty-one thousand, five hundred forty-two".