15155255242 has 4 divisors (see below), whose sum is σ = 22732882866. Its totient is φ = 7577627620.

The previous prime is 15155255123. The next prime is 15155255249. The reversal of 15155255242 is 24255255151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24255255151 = 173 ⋅140203787.

It can be written as a sum of positive squares in only one way, i.e., 8370603081 + 6784652161 = 91491^2 + 82369^2 .

It is a super-2 number, since 2×15155255242² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15155255249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3788813809 + ... + 3788813812.

Almost surely, 2^15155255242 is an apocalyptic number.

15155255242 is a deficient number, since it is larger than the sum of its proper divisors (7577627624).

15155255242 is an equidigital number, since it uses as much as digits as its factorization.

15155255242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7577627623.

The product of its digits is 100000, while the sum is 37.

Subtracting 15155255242 from its reverse (24255255151), we obtain a palindrome (9099999909).

The spelling of 15155255242 in words is "fifteen billion, one hundred fifty-five million, two hundred fifty-five thousand, two hundred forty-two".