2115221456 has 10 divisors (see below), whose sum is σ = 4098241602. Its totient is φ = 1057610720.

The previous prime is 2115221443. The next prime is 2115221483. The reversal of 2115221456 is 6541225112.

It can be written as a sum of positive squares in only one way, i.e., 1946221456 + 169000000 = 44116^2 + 13000^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66100655 + ... + 66100686.

Almost surely, 2^2115221456 is an apocalyptic number.

It is an amenable number.

2115221456 is a deficient number, since it is larger than the sum of its proper divisors (1983020146).

2115221456 is a wasteful number, since it uses less digits than its factorization.

2115221456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132201349 (or 132201343 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 2115221456 is about 45991.5367866741. The cubic root of 2115221456 is about 1283.6657320941.

Adding to 2115221456 its reverse (6541225112), we get a palindrome (8656446568).

The spelling of 2115221456 in words is "two billion, one hundred fifteen million, two hundred twenty-one thousand, four hundred fifty-six".