13551423157 has 2 divisors, whose sum is σ = 13551423158. Its totient is φ = 13551423156.

The previous prime is 13551423133. The next prime is 13551423169. The reversal of 13551423157 is 75132415531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10914189841 + 2637233316 = 104471^2 + 51354^2 .

It is an emirp because it is prime and its reverse (75132415531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13551423157 - 2²⁷ = 13417205429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13551223157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6775711578 + 6775711579.

It is an arithmetic number, because the mean of its divisors is an integer number (6775711579).

Almost surely, 2^13551423157 is an apocalyptic number.

It is an amenable number.

13551423157 is a deficient number, since it is larger than the sum of its proper divisors (1).

13551423157 is an equidigital number, since it uses as much as digits as its factorization.

13551423157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 37.

Adding to 13551423157 its reverse (75132415531), we get a palindrome (88683838688).

The spelling of 13551423157 in words is "thirteen billion, five hundred fifty-one million, four hundred twenty-three thousand, one hundred fifty-seven".