1123565131 has 8 divisors (see below), whose sum is σ = 1227036384. Its totient is φ = 1022528640.

The previous prime is 1123565129. The next prime is 1123565141. The reversal of 1123565131 is 1315653211.

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 1123565131 - 2¹ = 1123565129 is a prime.

It is a super-2 number, since 2×1123565131² = 2524797207198094322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123565131.

It is not an unprimeable number, because it can be changed into a prime (1123565101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607726 + ... + 609571.

It is an arithmetic number, because the mean of its divisors is an integer number (153379548).

Almost surely, 2^1123565131 is an apocalyptic number.

1123565131 is a deficient number, since it is larger than the sum of its proper divisors (103471253).

1123565131 is a wasteful number, since it uses less digits than its factorization.

1123565131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217381.

The product of its digits is 2700, while the sum is 28.

The square root of 1123565131 is about 33519.6230736564. The cubic root of 1123565131 is about 1039.5995533619.

The spelling of 1123565131 in words is "one billion, one hundred twenty-three million, five hundred sixty-five thousand, one hundred thirty-one".