157030013 has 4 divisors (see below), whose sum is σ = 179462880. Its totient is φ = 134597148.

The previous prime is 157030007. The next prime is 157030021. The reversal of 157030013 is 310030751.

It is a happy number.

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: 310030751 = 17 ⋅18237103.

It is not a de Polignac number, because 157030013 - 2⁶ = 157029949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157033013) 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, 11216423 + ... + 11216436.

It is an arithmetic number, because the mean of its divisors is an integer number (44865720).

Almost surely, 2^157030013 is an apocalyptic number.

It is an amenable number.

157030013 is a deficient number, since it is larger than the sum of its proper divisors (22432867).

157030013 is an equidigital number, since it uses as much as digits as its factorization.

157030013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22432866.

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 157030013 is about 12531.1616779930. The cubic root of 157030013 is about 539.5034449978.

Adding to 157030013 its reverse (310030751), we get a palindrome (467060764).

The spelling of 157030013 in words is "one hundred fifty-seven million, thirty thousand, thirteen".