157207223021621 has 8 divisors (see below), whose sum is σ = 165516563820000. Its totient is φ = 148901409866160.

The previous prime is 157207223021609. The next prime is 157207223021633. The reversal of 157207223021621 is 126120322702751.

It is an interprime number because it is at equal distance from previous prime (157207223021609) and next prime (157207223021633).

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 157207223021621 - 2³⁰ = 157206149279797 is a prime.

It is a super-2 number, since 2×157207223021621² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157207223023621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881819246 + ... + 881997503.

It is an arithmetic number, because the mean of its divisors is an integer number (20689570477500).

Almost surely, 2^{157207223021621} is an apocalyptic number.

It is an amenable number.

157207223021621 is a deficient number, since it is larger than the sum of its proper divisors (8309340798379).

157207223021621 is a wasteful number, since it uses less digits than its factorization.

157207223021621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763821459.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 157207223021621 in words is "one hundred fifty-seven trillion, two hundred seven billion, two hundred twenty-three million, twenty-one thousand, six hundred twenty-one".