1222312154 has 12 divisors (see below), whose sum is σ = 2132810154. Its totient is φ = 523848024.

The previous prime is 1222312153. The next prime is 1222312171. The reversal of 1222312154 is 4512132221.

It can be written as a sum of positive squares in only one way, i.e., 1098591025 + 123721129 = 33145^2 + 11123^2 .

It is a super-2 number, since 2×1222312154² = 2988094003632239432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1222312151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6236189 + ... + 6236384.

Almost surely, 2^1222312154 is an apocalyptic number.

1222312154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1222312154 is a deficient number, since it is larger than the sum of its proper divisors (910498000).

1222312154 is a wasteful number, since it uses less digits than its factorization.

1222312154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12472589 (or 12472582 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 1222312154 is about 34961.5811141316. The cubic root of 1222312154 is about 1069.2043329250.

Adding to 1222312154 its reverse (4512132221), we get a palindrome (5734444375).

The spelling of 1222312154 in words is "one billion, two hundred twenty-two million, three hundred twelve thousand, one hundred fifty-four".