157223135 has 4 divisors (see below), whose sum is σ = 188667768. Its totient is φ = 125778504.

The previous prime is 157223107. The next prime is 157223149. The reversal of 157223135 is 531322751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 531322751 = 307 ⋅1730693.

It is a cyclic number.

It is not a de Polignac number, because 157223135 - 2¹² = 157219039 is a prime.

It is a super-2 number, since 2×157223135² = 49438228358456450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157223098 and 157223107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15722309 + ... + 15722318.

It is an arithmetic number, because the mean of its divisors is an integer number (47166942).

Almost surely, 2^157223135 is an apocalyptic number.

157223135 is a deficient number, since it is larger than the sum of its proper divisors (31444633).

157223135 is an equidigital number, since it uses as much as digits as its factorization.

157223135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31444632.

The product of its digits is 6300, while the sum is 29.

The square root of 157223135 is about 12538.8649805315. The cubic root of 157223135 is about 539.7245222707.

Adding to 157223135 its reverse (531322751), we get a palindrome (688545886).

The spelling of 157223135 in words is "one hundred fifty-seven million, two hundred twenty-three thousand, one hundred thirty-five".