1115551356 has 24 divisors (see below), whose sum is σ = 2756068560. Its totient is φ = 349976832.

The previous prime is 1115551343. The next prime is 1115551357. The reversal of 1115551356 is 6531555111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115551357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2733991 + ... + 2734398.

It is an arithmetic number, because the mean of its divisors is an integer number (114836190).

Almost surely, 2^1115551356 is an apocalyptic number.

It is an amenable number.

1115551356 is an abundant number, since it is smaller than the sum of its proper divisors (1640517204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1115551356 is a wasteful number, since it uses less digits than its factorization.

1115551356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5468413 (or 5468411 counting only the distinct ones).

The product of its digits is 11250, while the sum is 33.

The square root of 1115551356 is about 33399.8705985517. The cubic root of 1115551356 is about 1037.1220222011.

The spelling of 1115551356 in words is "one billion, one hundred fifteen million, five hundred fifty-one thousand, three hundred fifty-six".