1222331657 has 2 divisors, whose sum is σ = 1222331658. Its totient is φ = 1222331656.

The previous prime is 1222331653. The next prime is 1222331683. The reversal of 1222331657 is 7561332221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1185011776 + 37319881 = 34424^2 + 6109^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222331657 - 2² = 1222331653 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222331653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611165828 + 611165829.

It is an arithmetic number, because the mean of its divisors is an integer number (611165829).

Almost surely, 2^1222331657 is an apocalyptic number.

It is an amenable number.

1222331657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222331657 is an equidigital number, since it uses as much as digits as its factorization.

1222331657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 1222331657 is about 34961.8600334708. The cubic root of 1222331657 is about 1069.2100195741.

Adding to 1222331657 its reverse (7561332221), we get a palindrome (8783663878).

The spelling of 1222331657 in words is "one billion, two hundred twenty-two million, three hundred thirty-one thousand, six hundred fifty-seven".