1215531450020 has 24 divisors (see below), whose sum is σ = 2557086499968. Its totient is φ = 485361064800.

The previous prime is 1215531450013. The next prime is 1215531450037. The reversal of 1215531450020 is 200541355121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53207996 + ... + 53230835.

It is an arithmetic number, because the mean of its divisors is an integer number (106545270832).

Almost surely, 2^{1215531450020} is an apocalyptic number.

1215531450020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215531450020 is an abundant number, since it is smaller than the sum of its proper divisors (1341555049948).

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

1215531450020 is a wasteful number, since it uses less digits than its factorization.

1215531450020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106439411 (or 106439409 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 1215531450020 in words is "one trillion, two hundred fifteen billion, five hundred thirty-one million, four hundred fifty thousand, twenty".