1131610851 has 64 divisors (see below), whose sum is σ = 1983744000. Its totient is φ = 637156800.

The previous prime is 1131610847. The next prime is 1131610861. The reversal of 1131610851 is 1580161311.

It is a happy number.

1131610851 is a `hidden beast` number, since 11 + 31 + 610 + 8 + 5 + 1 = 666.

It is not a de Polignac number, because 1131610851 - 2² = 1131610847 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1131610801) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 656671 + ... + 658391.

It is an arithmetic number, because the mean of its divisors is an integer number (30996000).

Almost surely, 2^1131610851 is an apocalyptic number.

1131610851 is a deficient number, since it is larger than the sum of its proper divisors (852133149).

1131610851 is an equidigital number, since it uses as much as digits as its factorization.

1131610851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1802 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 1131610851 is about 33639.4240586845. The cubic root of 1131610851 is about 1042.0751376761.

The spelling of 1131610851 in words is "one billion, one hundred thirty-one million, six hundred ten thousand, eight hundred fifty-one".