1131975511 has 8 divisors (see below), whose sum is σ = 1142138880. Its totient is φ = 1121831928.

The previous prime is 1131975487. The next prime is 1131975517. The reversal of 1131975511 is 1155791311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131975511 - 2⁵ = 1131975479 is a prime.

It is a super-2 number, since 2×1131975511² = 2562737115007422242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131975517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125040 + ... + 133786.

It is an arithmetic number, because the mean of its divisors is an integer number (142767360).

Almost surely, 2^1131975511 is an apocalyptic number.

1131975511 is a deficient number, since it is larger than the sum of its proper divisors (10163369).

1131975511 is a wasteful number, since it uses less digits than its factorization.

1131975511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9893.

The product of its digits is 4725, while the sum is 34.

The square root of 1131975511 is about 33644.8437505660. The cubic root of 1131975511 is about 1042.1870614021.

The spelling of 1131975511 in words is "one billion, one hundred thirty-one million, nine hundred seventy-five thousand, five hundred eleven".