157212233 has 2 divisors, whose sum is σ = 157212234. Its totient is φ = 157212232.

The previous prime is 157212229. The next prime is 157212239. The reversal of 157212233 is 332212751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84143929 + 73068304 = 9173^2 + 8548^2 .

It is a cyclic number.

It is not a de Polignac number, because 157212233 - 2² = 157212229 is a prime.

It is not a weakly prime, because it can be changed into another prime (157212239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78606116 + 78606117.

It is an arithmetic number, because the mean of its divisors is an integer number (78606117).

Almost surely, 2^157212233 is an apocalyptic number.

It is an amenable number.

157212233 is a deficient number, since it is larger than the sum of its proper divisors (1).

157212233 is an equidigital number, since it uses as much as digits as its factorization.

157212233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 157212233 is about 12538.4302446518. The cubic root of 157212233 is about 539.7120469804.

Adding to 157212233 its reverse (332212751), we get a palindrome (489424984).

The spelling of 157212233 in words is "one hundred fifty-seven million, two hundred twelve thousand, two hundred thirty-three".