1453147221987 has 16 divisors (see below), whose sum is σ = 2160471958560. Its totient is φ = 965317248000.

The previous prime is 1453147221983. The next prime is 1453147222019. The reversal of 1453147221987 is 7891227413541.

It is a happy number.

1453147221987 is a `hidden beast` number, since 1 + 4 + 531 + 4 + 7 + 2 + 21 + 9 + 87 = 666.

It is not a de Polignac number, because 1453147221987 - 2² = 1453147221983 is a prime.

It is a super-2 number, since 2×1453147221987² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1453147221983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95758014 + ... + 95773187.

It is an arithmetic number, because the mean of its divisors is an integer number (135029497410).

Almost surely, 2^{1453147221987} is an apocalyptic number.

1453147221987 is a deficient number, since it is larger than the sum of its proper divisors (707324736573).

1453147221987 is a wasteful number, since it uses less digits than its factorization.

1453147221987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191531491 (or 191531485 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 1453147221987 in words is "one trillion, four hundred fifty-three billion, one hundred forty-seven million, two hundred twenty-one thousand, nine hundred eighty-seven".