615225131125242 has 128 divisors (see below), whose sum is σ = 1386338563768320. Its totient is φ = 180323049984000.

The previous prime is 615225131125181. The next prime is 615225131125343. The reversal of 615225131125242 is 242521131522516.

It is a junction number, because it is equal to n+sod(n) for n = 615225131125194 and 615225131125203.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 37993268698 + ... + 37993284890.

It is an arithmetic number, because the mean of its divisors is an integer number (10830770029440).

Almost surely, 2^{615225131125242} is an apocalyptic number.

615225131125242 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 615225131125242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693169281884160).

615225131125242 is an abundant number, since it is smaller than the sum of its proper divisors (771113432643078).

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

615225131125242 is a wasteful number, since it uses less digits than its factorization.

615225131125242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24860.

The product of its digits is 288000, while the sum is 42.

Adding to 615225131125242 its reverse (242521131522516), we get a palindrome (857746262647758).

The spelling of 615225131125242 in words is "six hundred fifteen trillion, two hundred twenty-five billion, one hundred thirty-one million, one hundred twenty-five thousand, two hundred forty-two".