1151227431 has 16 divisors (see below), whose sum is σ = 1708960000. Its totient is φ = 765937944.

The previous prime is 1151227417. The next prime is 1151227453. The reversal of 1151227431 is 1347221511.

1151227431 is a `hidden beast` number, since 1 + 1 + 5 + 1 + 227 + 431 = 666.

It is not a de Polignac number, because 1151227431 - 2¹³ = 1151219239 is a prime.

It is a super-2 number, since 2×1151227431² = 2650649195773719522, which contains 22 as substring.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1151227395 and 1151227404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151222431) 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, 29251 + ... + 56196.

It is an arithmetic number, because the mean of its divisors is an integer number (106810000).

Almost surely, 2^1151227431 is an apocalyptic number.

1151227431 is a deficient number, since it is larger than the sum of its proper divisors (557732569).

1151227431 is an equidigital number, since it uses as much as digits as its factorization.

1151227431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85955 (or 85949 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 1151227431 is about 33929.7425719677. The cubic root of 1151227431 is about 1048.0621645889.

Adding to 1151227431 its reverse (1347221511), we get a palindrome (2498448942).

The spelling of 1151227431 in words is "one billion, one hundred fifty-one million, two hundred twenty-seven thousand, four hundred thirty-one".