215513149774 has 16 divisors (see below), whose sum is σ = 348167520288. Its totient is φ = 99458780832.

The previous prime is 215513149739. The next prime is 215513149793. The reversal of 215513149774 is 477941315512.

215513149774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 64437 + ... + 659680.

It is an arithmetic number, because the mean of its divisors is an integer number (21760470018).

Almost surely, 2^215513149774 is an apocalyptic number.

215513149774 is a deficient number, since it is larger than the sum of its proper divisors (132654370514).

215513149774 is a wasteful number, since it uses less digits than its factorization.

215513149774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735579.

The product of its digits is 1058400, while the sum is 49.

The spelling of 215513149774 in words is "two hundred fifteen billion, five hundred thirteen million, one hundred forty-nine thousand, seven hundred seventy-four".