1223250442520 has 128 divisors (see below), whose sum is σ = 2846173075200. Its totient is φ = 472900608000.

The previous prime is 1223250442501. The next prime is 1223250442549. The reversal of 1223250442520 is 252440523221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73855040 + ... + 73871600.

It is an arithmetic number, because the mean of its divisors is an integer number (22235727150).

Almost surely, 2^{1223250442520} is an apocalyptic number.

1223250442520 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 1223250442520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423086537600).

1223250442520 is an abundant number, since it is smaller than the sum of its proper divisors (1622922632680).

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

1223250442520 is a wasteful number, since it uses less digits than its factorization.

1223250442520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17109 (or 17105 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 1223250442520 its reverse (252440523221), we get a palindrome (1475690965741).

The spelling of 1223250442520 in words is "one trillion, two hundred twenty-three billion, two hundred fifty million, four hundred forty-two thousand, five hundred twenty".