1225311515000 has 80 divisors (see below), whose sum is σ = 2874454348920. Its totient is φ = 489518640000.

The previous prime is 1225311514991. The next prime is 1225311515009. The reversal of 1225311515000 is 5151135221.

It is an interprime number because it is at equal distance from previous prime (1225311514991) and next prime (1225311515009).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225311515009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3903914 + ... + 4206086.

Almost surely, 2^{1225311515000} is an apocalyptic number.

1225311515000 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 1225311515000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437227174460).

1225311515000 is an abundant number, since it is smaller than the sum of its proper divisors (1649142833920).

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

1225311515000 is an equidigital number, since it uses as much as digits as its factorization.

1225311515000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303010 (or 302991 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 1225311515000 in words is "one trillion, two hundred twenty-five billion, three hundred eleven million, five hundred fifteen thousand".