157321253 has 2 divisors, whose sum is σ = 157321254. Its totient is φ = 157321252.

The previous prime is 157321237. The next prime is 157321289. The reversal of 157321253 is 352123751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138250564 + 19070689 = 11758^2 + 4367^2 .

It is a cyclic number.

It is not a de Polignac number, because 157321253 - 2⁴ = 157321237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157321753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78660626 + 78660627.

It is an arithmetic number, because the mean of its divisors is an integer number (78660627).

Almost surely, 2^157321253 is an apocalyptic number.

It is an amenable number.

157321253 is a deficient number, since it is larger than the sum of its proper divisors (1).

157321253 is an equidigital number, since it uses as much as digits as its factorization.

157321253 is an odious number, because the sum of its binary digits is odd.

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

The square root of 157321253 is about 12542.7769253862. The cubic root of 157321253 is about 539.8367739404.

The spelling of 157321253 in words is "one hundred fifty-seven million, three hundred twenty-one thousand, two hundred fifty-three".