157222347 has 4 divisors (see below), whose sum is σ = 209629800. Its totient is φ = 104814896.

The previous prime is 157222343. The next prime is 157222367. The reversal of 157222347 is 743222751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 743222751 = 3 ⋅247740917.

It is a cyclic number.

It is not a de Polignac number, because 157222347 - 2² = 157222343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157222343) 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, 26203722 + ... + 26203727.

It is an arithmetic number, because the mean of its divisors is an integer number (52407450).

Almost surely, 2^157222347 is an apocalyptic number.

157222347 is a deficient number, since it is larger than the sum of its proper divisors (52407453).

157222347 is an equidigital number, since it uses as much as digits as its factorization.

157222347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52407452.

The product of its digits is 23520, while the sum is 33.

The square root of 157222347 is about 12538.8335581903. The cubic root of 157222347 is about 539.7236205721.

The spelling of 157222347 in words is "one hundred fifty-seven million, two hundred twenty-two thousand, three hundred forty-seven".