2221045661500 has 48 divisors (see below), whose sum is σ = 4856258193696. Its totient is φ = 887411952000.

The previous prime is 2221045661453. The next prime is 2221045661509. The reversal of 2221045661500 is 51665401222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221045661509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2073841 + ... + 2956840.

It is an arithmetic number, because the mean of its divisors is an integer number (101172045702).

Almost surely, 2^{2221045661500} is an apocalyptic number.

2221045661500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221045661500 is an abundant number, since it is smaller than the sum of its proper divisors (2635212532196).

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

2221045661500 is a wasteful number, since it uses less digits than its factorization.

2221045661500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5031583 (or 5031571 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 2221045661500 in words is "two trillion, two hundred twenty-one billion, forty-five million, six hundred sixty-one thousand, five hundred".