1222651251 has 12 divisors (see below), whose sum is σ = 1766408280. Its totient is φ = 814936320.

The previous prime is 1222651249. The next prime is 1222651259. The reversal of 1222651251 is 1521562221.

1222651251 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 651 + 2 + 5 + 1 = 666.

It is not a de Polignac number, because 1222651251 - 2¹ = 1222651249 is a prime.

It is a super-3 number, since 3×1222651251³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1222651259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47955 + ... + 68883.

It is an arithmetic number, because the mean of its divisors is an integer number (147200690).

Almost surely, 2^1222651251 is an apocalyptic number.

1222651251 is a deficient number, since it is larger than the sum of its proper divisors (543757029).

1222651251 is a wasteful number, since it uses less digits than its factorization.

1222651251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27426 (or 27423 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1222651251 is about 34966.4303439742. The cubic root of 1222651251 is about 1069.3031975938.

The spelling of 1222651251 in words is "one billion, two hundred twenty-two million, six hundred fifty-one thousand, two hundred fifty-one".