157640022 has 96 divisors (see below), whose sum is σ = 375238656. Its totient is φ = 47678400.

The previous prime is 157640011. The next prime is 157640023. The reversal of 157640022 is 220046751.

157640022 is a `hidden beast` number, since 15 + 7 + 640 + 0 + 2 + 2 = 666.

157640022 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 (157640023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 911128 + ... + 911300.

It is an arithmetic number, because the mean of its divisors is an integer number (3908736).

Almost surely, 2^157640022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157640022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187619328).

157640022 is an abundant number, since it is smaller than the sum of its proper divisors (217598634).

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

157640022 is a wasteful number, since it uses less digits than its factorization.

157640022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 157640022 is about 12555.4777686873. The cubic root of 157640022 is about 540.2011390622.

Adding to 157640022 its reverse (220046751), we get a palindrome (377686773).

The spelling of 157640022 in words is "one hundred fifty-seven million, six hundred forty thousand, twenty-two".