7215493151889 has 135 divisors (see below), whose sum is σ = 12148849492857. Its totient is φ = 4264558729200.

The previous prime is 7215493151821. The next prime is 7215493151917. The reversal of 7215493151889 is 9881513945127.

The square root of 7215493151889 is 2686167.

It is a perfect power (a square), and thus also a powerful number.

7215493151889 is a `hidden beast` number, since 7 + 2 + 1 + 5 + 4 + 9 + 31 + 518 + 89 = 666.

It is not a de Polignac number, because 7215493151889 - 2²⁵ = 7215459597457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7215493151989) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 11435012604 + ... + 11435013234.

Almost surely, 2^{7215493151889} is an apocalyptic number.

7215493151889 is the 2686167-th square number.

7215493151889 is the 1343084-th centered octagonal number.

It is an amenable number.

7215493151889 is a deficient number, since it is larger than the sum of its proper divisors (4933356340968).

7215493151889 is an frugal number, since it uses more digits than its factorization.

7215493151889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382 (or 688 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 63.

The spelling of 7215493151889 in words is "seven trillion, two hundred fifteen billion, four hundred ninety-three million, one hundred fifty-one thousand, eight hundred eighty-nine".