157222051 has 4 divisors (see below), whose sum is σ = 179682352. Its totient is φ = 134761752.

The previous prime is 157222031. The next prime is 157222067. The reversal of 157222051 is 150222751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150222751 = 7 ⋅21460393.

It is a cyclic number.

It is not a de Polignac number, because 157222051 - 2⁷ = 157221923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157222031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11230140 + ... + 11230153.

It is an arithmetic number, because the mean of its divisors is an integer number (44920588).

Almost surely, 2^157222051 is an apocalyptic number.

157222051 is a deficient number, since it is larger than the sum of its proper divisors (22460301).

157222051 is an equidigital number, since it uses as much as digits as its factorization.

157222051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22460300.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 157222051 is about 12538.8217548540. The cubic root of 157222051 is about 539.7232818622.

The spelling of 157222051 in words is "one hundred fifty-seven million, two hundred twenty-two thousand, fifty-one".