1222864157 has 2 divisors, whose sum is σ = 1222864158. Its totient is φ = 1222864156.

The previous prime is 1222864151. The next prime is 1222864193. The reversal of 1222864157 is 7514682221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1122183001 + 100681156 = 33499^2 + 10034^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222864157 - 2¹⁸ = 1222602013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222864157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222864151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611432078 + 611432079.

It is an arithmetic number, because the mean of its divisors is an integer number (611432079).

Almost surely, 2^1222864157 is an apocalyptic number.

It is an amenable number.

1222864157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222864157 is an equidigital number, since it uses as much as digits as its factorization.

1222864157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 38.

The square root of 1222864157 is about 34969.4746457535. The cubic root of 1222864157 is about 1069.3652615861.

The spelling of 1222864157 in words is "one billion, two hundred twenty-two million, eight hundred sixty-four thousand, one hundred fifty-seven".