1222655531 has 4 divisors (see below), whose sum is σ = 1262096064. Its totient is φ = 1183215000.

The previous prime is 1222655527. The next prime is 1222655549. The reversal of 1222655531 is 1355562221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1355562221 = 13 ⋅104274017.

It is a cyclic number.

It is not a de Polignac number, because 1222655531 - 2² = 1222655527 is a prime.

It is a super-2 number, since 2×1222655531² = 2989773094969783922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222655591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19720220 + ... + 19720281.

It is an arithmetic number, because the mean of its divisors is an integer number (315524016).

Almost surely, 2^1222655531 is an apocalyptic number.

1222655531 is a deficient number, since it is larger than the sum of its proper divisors (39440533).

1222655531 is an equidigital number, since it uses as much as digits as its factorization.

1222655531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39440532.

The product of its digits is 18000, while the sum is 32.

The square root of 1222655531 is about 34966.4915454782. The cubic root of 1222655531 is about 1069.3044453228.

The spelling of 1222655531 in words is "one billion, two hundred twenty-two million, six hundred fifty-five thousand, five hundred thirty-one".