156245805221 has 8 divisors (see below), whose sum is σ = 171163152000. Its totient is φ = 141447322240.

The previous prime is 156245805203. The next prime is 156245805239. The reversal of 156245805221 is 122508542651.

It is an interprime number because it is at equal distance from previous prime (156245805203) and next prime (156245805239).

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

It is a cyclic number.

It is not a de Polignac number, because 156245805221 - 2¹⁴ = 156245788837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156245805251) 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 7 ways as a sum of consecutive naturals, for example, 29713196 + ... + 29718453.

It is an arithmetic number, because the mean of its divisors is an integer number (21395394000).

Almost surely, 2^156245805221 is an apocalyptic number.

156245805221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

156245805221 is a deficient number, since it is larger than the sum of its proper divisors (14917346779).

156245805221 is a wasteful number, since it uses less digits than its factorization.

156245805221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59431899.

The product of its (nonzero) digits is 192000, while the sum is 41.

The spelling of 156245805221 in words is "one hundred fifty-six billion, two hundred forty-five million, eight hundred five thousand, two hundred twenty-one".