1155250031 has 12 divisors (see below), whose sum is σ = 1272164760. Its totient is φ = 1048301280.

The previous prime is 1155250021. The next prime is 1155250051. The reversal of 1155250031 is 1300525511.

It is a happy number.

It is not a de Polignac number, because 1155250031 - 2²² = 1151055727 is a prime.

It is a super-3 number, since 3×1155250031³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1155249979 and 1155250006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155250021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47960 + ... + 67901.

It is an arithmetic number, because the mean of its divisors is an integer number (106013730).

Almost surely, 2^1155250031 is an apocalyptic number.

1155250031 is a deficient number, since it is larger than the sum of its proper divisors (116914729).

1155250031 is a wasteful number, since it uses less digits than its factorization.

1155250031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115946 (or 115933 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1155250031 is about 33988.9692547450. The cubic root of 1155250031 is about 1049.2814527571.

Adding to 1155250031 its reverse (1300525511), we get a palindrome (2455775542).

The spelling of 1155250031 in words is "one billion, one hundred fifty-five million, two hundred fifty thousand, thirty-one".