20150131242 has 16 divisors (see below), whose sum is σ = 40301948160. Its totient is φ = 6716429472.

The previous prime is 20150131213. The next prime is 20150131279. The reversal of 20150131242 is 24213105102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128359 + ... + 238277.

It is an arithmetic number, because the mean of its divisors is an integer number (2518871760).

Almost surely, 2^20150131242 is an apocalyptic number.

20150131242 is an abundant number, since it is smaller than the sum of its proper divisors (20151816918).

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

20150131242 is a wasteful number, since it uses less digits than its factorization.

20150131242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140477.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 20150131242 its reverse (24213105102), we get a palindrome (44363236344).

The spelling of 20150131242 in words is "twenty billion, one hundred fifty million, one hundred thirty-one thousand, two hundred forty-two".