1222355531 has 2 divisors, whose sum is σ = 1222355532. Its totient is φ = 1222355530.

The previous prime is 1222355521. The next prime is 1222355549. The reversal of 1222355531 is 1355532221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222355531 - 2¹⁴ = 1222339147 is a prime.

It is a super-2 number, since 2×1222355531² = 2988306088332583922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1222355494 and 1222355503.

It is not a weakly prime, because it can be changed into another prime (1222355501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611177765 + 611177766.

It is an arithmetic number, because the mean of its divisors is an integer number (611177766).

Almost surely, 2^1222355531 is an apocalyptic number.

1222355531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222355531 is an equidigital number, since it uses as much as digits as its factorization.

1222355531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 29.

The square root of 1222355531 is about 34962.2014610064. The cubic root of 1222355531 is about 1069.2169806292.

Adding to 1222355531 its reverse (1355532221), we get a palindrome (2577887752).

The spelling of 1222355531 in words is "one billion, two hundred twenty-two million, three hundred fifty-five thousand, five hundred thirty-one".