157581233 has 4 divisors (see below), whose sum is σ = 157667328. Its totient is φ = 157495140.

The previous prime is 157581223. The next prime is 157581251. The reversal of 157581233 is 332185751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 332185751 = 3391 ⋅97961.

It is a cyclic number.

It is not a de Polignac number, because 157581233 - 2⁶ = 157581169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157581193 and 157581202.

It is not an unprimeable number, because it can be changed into a prime (157581223) 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, 40241 + ... + 43982.

It is an arithmetic number, because the mean of its divisors is an integer number (39416832).

Almost surely, 2^157581233 is an apocalyptic number.

It is an amenable number.

157581233 is a deficient number, since it is larger than the sum of its proper divisors (86095).

157581233 is an equidigital number, since it uses as much as digits as its factorization.

157581233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86094.

The product of its digits is 25200, while the sum is 35.

The square root of 157581233 is about 12553.1363810006. The cubic root of 157581233 is about 540.1339779589.

The spelling of 157581233 in words is "one hundred fifty-seven million, five hundred eighty-one thousand, two hundred thirty-three".