2251163021216 has 12 divisors (see below), whose sum is σ = 4431977198082. Its totient is φ = 1125581510592.

The previous prime is 2251163021183. The next prime is 2251163021251. The reversal of 2251163021216 is 6121203611522.

It can be written as a sum of positive squares in only one way, i.e., 1655493955600 + 595669065616 = 1286660^2 + 771796^2 .

It is a super-2 number, since 2×2251163021216² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 70348844413 = 2251163021216 / (2 + 2 + 5 + 1 + 1 + 6 + 3 + 0 + 2 + 1 + 2 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35174422175 + ... + 35174422238.

Almost surely, 2^{2251163021216} is an apocalyptic number.

It is an amenable number.

2251163021216 is a deficient number, since it is larger than the sum of its proper divisors (2180814176866).

2251163021216 is an equidigital number, since it uses as much as digits as its factorization.

2251163021216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70348844423 (or 70348844415 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 2251163021216 its reverse (6121203611522), we get a palindrome (8372366632738).

The spelling of 2251163021216 in words is "two trillion, two hundred fifty-one billion, one hundred sixty-three million, twenty-one thousand, two hundred sixteen".