215100161506 has 8 divisors (see below), whose sum is σ = 322739456940. Its totient is φ = 107520342528.

The previous prime is 215100161501. The next prime is 215100161519. The reversal of 215100161506 is 605161001512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 208720145881 + 6380015625 = 456859^2 + 79875^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (215100161501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14860071 + ... + 14874538.

Almost surely, 2^215100161506 is an apocalyptic number.

215100161506 is a deficient number, since it is larger than the sum of its proper divisors (107639295434).

215100161506 is a wasteful number, since it uses less digits than its factorization.

215100161506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29738228.

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 215100161506 in words is "two hundred fifteen billion, one hundred million, one hundred sixty-one thousand, five hundred six".