15015440142 has 24 divisors (see below), whose sum is σ = 33655298040. Its totient is φ = 4832555280.

The previous prime is 15015440131. The next prime is 15015440191. The reversal of 15015440142 is 24104451051.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14382084 + ... + 14383127.

It is an arithmetic number, because the mean of its divisors is an integer number (1402304085).

Almost surely, 2^15015440142 is an apocalyptic number.

15015440142 is an abundant number, since it is smaller than the sum of its proper divisors (18639857898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15015440142 is a wasteful number, since it uses less digits than its factorization.

15015440142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28765248 (or 28765245 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 15015440142 its reverse (24104451051), we get a palindrome (39119891193).

The spelling of 15015440142 in words is "fifteen billion, fifteen million, four hundred forty thousand, one hundred forty-two".