157133257 has 4 divisors (see below), whose sum is σ = 157453776. Its totient is φ = 156812740.

The previous prime is 157133243. The next prime is 157133269. The reversal of 157133257 is 752331751.

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: 752331751 = 263 ⋅2860577.

It is a cyclic number.

It is not a de Polignac number, because 157133257 - 2⁷ = 157133129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157133297) 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, 159523 + ... + 160504.

It is an arithmetic number, because the mean of its divisors is an integer number (39363444).

Almost surely, 2^157133257 is an apocalyptic number.

It is an amenable number.

157133257 is a deficient number, since it is larger than the sum of its proper divisors (320519).

157133257 is an equidigital number, since it uses as much as digits as its factorization.

157133257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320518.

The product of its digits is 22050, while the sum is 34.

The square root of 157133257 is about 12535.2804914768. The cubic root of 157133257 is about 539.6216565630.

The spelling of 157133257 in words is "one hundred fifty-seven million, one hundred thirty-three thousand, two hundred fifty-seven".