16513157 has 4 divisors (see below), whose sum is σ = 16824780. Its totient is φ = 16201536.

The previous prime is 16513139. The next prime is 16513177. The reversal of 16513157 is 75131561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9928801 + 6584356 = 3151^2 + 2566^2 .

It is a cyclic number.

It is not a de Polignac number, because 16513157 - 2⁸ = 16512901 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 (16513117) 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, 155732 + ... + 155837.

It is an arithmetic number, because the mean of its divisors is an integer number (4206195).

Almost surely, 2^16513157 is an apocalyptic number.

It is an amenable number.

16513157 is a deficient number, since it is larger than the sum of its proper divisors (311623).

16513157 is an equidigital number, since it uses as much as digits as its factorization.

16513157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311622.

The product of its digits is 3150, while the sum is 29.

The square root of 16513157 is about 4063.6383943456. The cubic root of 16513157 is about 254.6498179311.

The spelling of 16513157 in words is "sixteen million, five hundred thirteen thousand, one hundred fifty-seven".