15525354139 has 2 divisors, whose sum is σ = 15525354140. Its totient is φ = 15525354138.

The previous prime is 15525354071. The next prime is 15525354167. The reversal of 15525354139 is 93145352551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15525354139 is a prime.

It is a super-2 number, since 2×15525354139² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15525354095 and 15525354104.

It is not a weakly prime, because it can be changed into another prime (15525354239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7762677069 + 7762677070.

It is an arithmetic number, because the mean of its divisors is an integer number (7762677070).

Almost surely, 2^15525354139 is an apocalyptic number.

15525354139 is a deficient number, since it is larger than the sum of its proper divisors (1).

15525354139 is an equidigital number, since it uses as much as digits as its factorization.

15525354139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405000, while the sum is 43.

It can be divided in two parts, 15525 and 354139, that added together give a square (369664 = 608²).

The spelling of 15525354139 in words is "fifteen billion, five hundred twenty-five million, three hundred fifty-four thousand, one hundred thirty-nine".