157561233 has 8 divisors (see below), whose sum is σ = 210288000. Its totient is φ = 104937648.

The previous prime is 157561213. The next prime is 157561267. The reversal of 157561233 is 332165751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157561233 - 2⁹ = 157560721 is a prime.

It is a super-3 number, since 3×157561233³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 157561194 and 157561203.

It is not an unprimeable number, because it can be changed into a prime (157561213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22158 + ... + 28391.

It is an arithmetic number, because the mean of its divisors is an integer number (26286000).

Almost surely, 2^157561233 is an apocalyptic number.

It is an amenable number.

157561233 is a deficient number, since it is larger than the sum of its proper divisors (52726767).

157561233 is a wasteful number, since it uses less digits than its factorization.

157561233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51591.

The product of its digits is 18900, while the sum is 33.

The square root of 157561233 is about 12552.3397420561. The cubic root of 157561233 is about 540.1111259640. Note that the first 4 decimals are identical.

The spelling of 157561233 in words is "one hundred fifty-seven million, five hundred sixty-one thousand, two hundred thirty-three".