157443621 has 16 divisors (see below), whose sum is σ = 215961600. Its totient is φ = 101953728.

The previous prime is 157443617. The next prime is 157443631. The reversal of 157443621 is 126344751.

It is not a de Polignac number, because 157443621 - 2² = 157443617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157443631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122460 + ... + 123738.

It is an arithmetic number, because the mean of its divisors is an integer number (13497600).

Almost surely, 2^157443621 is an apocalyptic number.

It is an amenable number.

157443621 is a deficient number, since it is larger than the sum of its proper divisors (58517979).

157443621 is a wasteful number, since it uses less digits than its factorization.

157443621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428.

The product of its digits is 20160, while the sum is 33.

The square root of 157443621 is about 12547.6540038367. The cubic root of 157443621 is about 539.9767033845.

The spelling of 157443621 in words is "one hundred fifty-seven million, four hundred forty-three thousand, six hundred twenty-one".