157720216 has 64 divisors (see below), whose sum is σ = 324720000. Its totient is φ = 71559936.

The previous prime is 157720207. The next prime is 157720217. The reversal of 157720216 is 612027751.

157720216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157720217) 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, 385420 + ... + 385828.

It is an arithmetic number, because the mean of its divisors is an integer number (5073750).

Almost surely, 2^157720216 is an apocalyptic number.

It is an amenable number.

157720216 is an abundant number, since it is smaller than the sum of its proper divisors (166999784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157720216 is a wasteful number, since it uses less digits than its factorization.

157720216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 157720216 is about 12558.6709487907. The cubic root of 157720216 is about 540.2927265192.

Adding to 157720216 its reverse (612027751), we get a palindrome (769747967).

The spelling of 157720216 in words is "one hundred fifty-seven million, seven hundred twenty thousand, two hundred sixteen".