157240313 has 2 divisors, whose sum is σ = 157240314. Its totient is φ = 157240312.

The previous prime is 157240273. The next prime is 157240337. The reversal of 157240313 is 313042751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103774969 + 53465344 = 10187^2 + 7312^2 .

It is a cyclic number.

It is not a de Polignac number, because 157240313 - 2¹⁰ = 157239289 is a prime.

It is not a weakly prime, because it can be changed into another prime (157240373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78620156 + 78620157.

It is an arithmetic number, because the mean of its divisors is an integer number (78620157).

Almost surely, 2^157240313 is an apocalyptic number.

It is an amenable number.

157240313 is a deficient number, since it is larger than the sum of its proper divisors (1).

157240313 is an equidigital number, since it uses as much as digits as its factorization.

157240313 is an evil number, because the sum of its binary digits is even.

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

The square root of 157240313 is about 12539.5499520517. The cubic root of 157240313 is about 539.7441780934.

The spelling of 157240313 in words is "one hundred fifty-seven million, two hundred forty thousand, three hundred thirteen".