1123202431 has 16 divisors (see below), whose sum is σ = 1221631488. Its totient is φ = 1026547200.

The previous prime is 1123202389. The next prime is 1123202471. The reversal of 1123202431 is 1342023211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1123202431 - 2¹⁷ = 1123071359 is a prime.

It is a super-2 number, since 2×1123202431² = 2523167402008619522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123202399 and 1123202408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123202471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 597465 + ... + 599341.

It is an arithmetic number, because the mean of its divisors is an integer number (76351968).

Almost surely, 2^1123202431 is an apocalyptic number.

1123202431 is a deficient number, since it is larger than the sum of its proper divisors (98429057).

1123202431 is a wasteful number, since it uses less digits than its factorization.

1123202431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1123202431 is about 33514.2123732604. The cubic root of 1123202431 is about 1039.4876763470.

Adding to 1123202431 its reverse (1342023211), we get a palindrome (2465225642).

The spelling of 1123202431 in words is "one billion, one hundred twenty-three million, two hundred two thousand, four hundred thirty-one".