215302491772 has 12 divisors (see below), whose sum is σ = 377865182520. Its totient is φ = 107341011056.

The previous prime is 215302491727. The next prime is 215302491773. The reversal of 215302491772 is 277194203512.

It is a super-3 number, since 3×215302491772³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215302491773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77557147 + ... + 77559922.

It is an arithmetic number, because the mean of its divisors is an integer number (31488765210).

Almost surely, 2^215302491772 is an apocalyptic number.

It is an amenable number.

215302491772 is a deficient number, since it is larger than the sum of its proper divisors (162562690748).

215302491772 is a wasteful number, since it uses less digits than its factorization.

215302491772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155117420 (or 155117418 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 215302491772 in words is "two hundred fifteen billion, three hundred two million, four hundred ninety-one thousand, seven hundred seventy-two".