157690222 has 4 divisors (see below), whose sum is σ = 236535336. Its totient is φ = 78845110.

The previous prime is 157690207. The next prime is 157690237. The reversal of 157690222 is 222096751.

157690222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (157690207) and next prime (157690237).

It is a super-2 number, since 2×157690222² = 49732412228818568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39422554 + ... + 39422557.

It is an arithmetic number, because the mean of its divisors is an integer number (59133834).

Almost surely, 2^157690222 is an apocalyptic number.

157690222 is a deficient number, since it is larger than the sum of its proper divisors (78845114).

157690222 is an equidigital number, since it uses as much as digits as its factorization.

157690222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78845113.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 157690222 is about 12557.4767369882. The cubic root of 157690222 is about 540.2584747963.

The spelling of 157690222 in words is "one hundred fifty-seven million, six hundred ninety thousand, two hundred twenty-two".