1122145531 has 4 divisors (see below), whose sum is σ = 1208464432. Its totient is φ = 1035826632.

The previous prime is 1122145513. The next prime is 1122145543. The reversal of 1122145531 is 1355412211.

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 1122145531 - 2⁵ = 1122145499 is a prime.

It is a super-2 number, since 2×1122145531² = 2518421185486543922, 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 = 1122145496 and 1122145505.

It is not an unprimeable number, because it can be changed into a prime (1122145331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43159431 + ... + 43159456.

It is an arithmetic number, because the mean of its divisors is an integer number (302116108).

Almost surely, 2^1122145531 is an apocalyptic number.

1122145531 is a deficient number, since it is larger than the sum of its proper divisors (86318901).

1122145531 is an equidigital number, since it uses as much as digits as its factorization.

1122145531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86318900.

The product of its digits is 1200, while the sum is 25.

The square root of 1122145531 is about 33498.4407249054. The cubic root of 1122145531 is about 1039.1615317242.

Adding to 1122145531 its reverse (1355412211), we get a palindrome (2477557742).

The spelling of 1122145531 in words is "one billion, one hundred twenty-two million, one hundred forty-five thousand, five hundred thirty-one".