157222771 has 4 divisors (see below), whose sum is σ = 157339152. Its totient is φ = 157106392.

The previous prime is 157222763. The next prime is 157222781. The reversal of 157222771 is 177222751.

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

It is a cyclic number.

It is not a de Polignac number, because 157222771 - 2³ = 157222763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157222781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56140 + ... + 58873.

It is an arithmetic number, because the mean of its divisors is an integer number (39334788).

Almost surely, 2^157222771 is an apocalyptic number.

157222771 is a deficient number, since it is larger than the sum of its proper divisors (116381).

157222771 is a wasteful number, since it uses less digits than its factorization.

157222771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116380.

The product of its digits is 13720, while the sum is 34.

The square root of 157222771 is about 12538.8504656527. The cubic root of 157222771 is about 539.7241057504.

The spelling of 157222771 in words is "one hundred fifty-seven million, two hundred twenty-two thousand, seven hundred seventy-one".