157233013 has 6 divisors (see below), whose sum is σ = 182903766. Its totient is φ = 134771112.

The previous prime is 157232993. The next prime is 157233029. The reversal of 157233013 is 310332751.

It can be written as a sum of positive squares in only one way, i.e., 157176369 + 56644 = 12537^2 + 238^2 .

It is not a de Polignac number, because 157233013 - 2⁵ = 157232981 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 (157233913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1604370 + ... + 1604467.

It is an arithmetic number, because the mean of its divisors is an integer number (30483961).

Almost surely, 2^157233013 is an apocalyptic number.

It is an amenable number.

157233013 is a deficient number, since it is larger than the sum of its proper divisors (25670753).

157233013 is an equidigital number, since it uses as much as digits as its factorization.

157233013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208851 (or 3208844 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 25.

The square root of 157233013 is about 12539.2588696462. The cubic root of 157233013 is about 539.7358252874.

Adding to 157233013 its reverse (310332751), we get a palindrome (467565764).

The spelling of 157233013 in words is "one hundred fifty-seven million, two hundred thirty-three thousand, thirteen".