1123557431 has 8 divisors (see below), whose sum is σ = 1138584384. Its totient is φ = 1108607200.

The previous prime is 1123557427. The next prime is 1123557439. The reversal of 1123557431 is 1347553211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123557431 - 2² = 1123557427 is a prime.

It is a super-2 number, since 2×1123557431² = 2524762601510639522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123557439) 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 7 ways as a sum of consecutive naturals, for example, 10610 + ... + 48576.

It is an arithmetic number, because the mean of its divisors is an integer number (142323048).

Almost surely, 2^1123557431 is an apocalyptic number.

1123557431 is a deficient number, since it is larger than the sum of its proper divisors (15026953).

1123557431 is a wasteful number, since it uses less digits than its factorization.

1123557431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38361.

The product of its digits is 12600, while the sum is 32.

The square root of 1123557431 is about 33519.5082153662. The cubic root of 1123557431 is about 1039.5971785004.

The spelling of 1123557431 in words is "one billion, one hundred twenty-three million, five hundred fifty-seven thousand, four hundred thirty-one".