1131222623 has 4 divisors (see below), whose sum is σ = 1147155408. Its totient is φ = 1115289840.

The previous prime is 1131222583. The next prime is 1131222661. The reversal of 1131222623 is 3262221311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131222623 - 2¹² = 1131218527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131222683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7966286 + ... + 7966427.

It is an arithmetic number, because the mean of its divisors is an integer number (286788852).

Almost surely, 2^1131222623 is an apocalyptic number.

1131222623 is a deficient number, since it is larger than the sum of its proper divisors (15932785).

1131222623 is an equidigital number, since it uses as much as digits as its factorization.

1131222623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15932784.

The product of its digits is 864, while the sum is 23.

The square root of 1131222623 is about 33633.6531319451. The cubic root of 1131222623 is about 1041.9559538830.

Adding to 1131222623 its reverse (3262221311), we get a palindrome (4393443934).

It can be divided in two parts, 11312 and 22623, that multiplied together give a triangular number (255911376 = T₂₂₆₂₃).

The spelling of 1131222623 in words is "one billion, one hundred thirty-one million, two hundred twenty-two thousand, six hundred twenty-three".