1215445221430 has 48 divisors (see below), whose sum is σ = 2509328862432. Its totient is φ = 422763545600.

The previous prime is 1215445221421. The next prime is 1215445221443. The reversal of 1215445221430 is 341225445121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21809131 + ... + 21864790.

It is an arithmetic number, because the mean of its divisors is an integer number (52277684634).

Almost surely, 2^{1215445221430} is an apocalyptic number.

1215445221430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215445221430 is an abundant number, since it is smaller than the sum of its proper divisors (1293883641002).

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

1215445221430 is a wasteful number, since it uses less digits than its factorization.

1215445221430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43673973 (or 43673962 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 1215445221430 in words is "one trillion, two hundred fifteen billion, four hundred forty-five million, two hundred twenty-one thousand, four hundred thirty".