1115867951 has 4 divisors (see below), whose sum is σ = 1217310504. Its totient is φ = 1014425400.

The previous prime is 1115867911. The next prime is 1115867957. The reversal of 1115867951 is 1597685111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1597685111 = 11 ⋅145244101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115867951 is a prime.

It is a super-2 number, since 2×1115867951² = 2490322568137876802, 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 (1115867957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50721260 + ... + 50721281.

It is an arithmetic number, because the mean of its divisors is an integer number (304327626).

Almost surely, 2^1115867951 is an apocalyptic number.

1115867951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1115867951 is a deficient number, since it is larger than the sum of its proper divisors (101442553).

1115867951 is a wasteful number, since it uses less digits than its factorization.

1115867951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101442552.

The product of its digits is 75600, while the sum is 44.

The square root of 1115867951 is about 33404.6097268027. The cubic root of 1115867951 is about 1037.2201251371.

The spelling of 1115867951 in words is "one billion, one hundred fifteen million, eight hundred sixty-seven thousand, nine hundred fifty-one".