1131100251 has 16 divisors (see below), whose sum is σ = 1580853120. Its totient is φ = 718562880.

The previous prime is 1131100241. The next prime is 1131100283. The reversal of 1131100251 is 1520011311.

1131100251 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1131100251 - 2²⁵ = 1097545819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131100251.

It is not an unprimeable number, because it can be changed into a prime (1131100211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101641 + ... + 112218.

It is an arithmetic number, because the mean of its divisors is an integer number (98803320).

Almost surely, 2^1131100251 is an apocalyptic number.

1131100251 is a deficient number, since it is larger than the sum of its proper divisors (449752869).

1131100251 is a wasteful number, since it uses less digits than its factorization.

1131100251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213946.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 1131100251 is about 33631.8338929057. The cubic root of 1131100251 is about 1041.9183807212.

Adding to 1131100251 its reverse (1520011311), we get a palindrome (2651111562).

The spelling of 1131100251 in words is "one billion, one hundred thirty-one million, one hundred thousand, two hundred fifty-one".