1215504250000 has 140 divisors (see below), whose sum is σ = 3116935024596. Its totient is φ = 457600000000.

The previous prime is 1215504249923. The next prime is 1215504250001. The reversal of 1215504250000 is 524055121.

It can be written as a sum of positive squares in 14 ways, for example, as 1157294002176 + 58210247824 = 1075776^2 + 241268^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1215504250001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4107000 + ... + 4393000.

Almost surely, 2^{1215504250000} is an apocalyptic number.

1215504250000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215504250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1558467512298).

1215504250000 is an abundant number, since it is smaller than the sum of its proper divisors (1901430774596).

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

1215504250000 is an frugal number, since it uses more digits than its factorization.

1215504250000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286056 (or 286025 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 1215504250000 in words is "one trillion, two hundred fifteen billion, five hundred four million, two hundred fifty thousand".