315123442000 has 80 divisors (see below), whose sum is σ = 762267497472. Its totient is φ = 125999913600.

The previous prime is 315123441989. The next prime is 315123442019. The reversal of 315123442000 is 244321513.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5296417 + ... + 5355583.

Almost surely, 2^315123442000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315123442000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381133748736).

315123442000 is an abundant number, since it is smaller than the sum of its proper divisors (447144055472).

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

315123442000 is a wasteful number, since it uses less digits than its factorization.

315123442000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61853 (or 61837 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 315123442000 its reverse (244321513), we get a palindrome (315367763513).

The spelling of 315123442000 in words is "three hundred fifteen billion, one hundred twenty-three million, four hundred forty-two thousand".