55131268 has 12 divisors (see below), whose sum is σ = 99592192. Its totient is φ = 26676360.

The previous prime is 55131259. The next prime is 55131269. The reversal of 55131268 is 86213155.

It is a super-2 number, since 2×55131268² = 6078913422575648, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (55131269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222180 + ... + 222427.

Almost surely, 2^55131268 is an apocalyptic number.

It is an amenable number.

55131268 is a deficient number, since it is larger than the sum of its proper divisors (44460924).

55131268 is a wasteful number, since it uses less digits than its factorization.

55131268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444642 (or 444640 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 55131268 is about 7425.0432995370. The cubic root of 55131268 is about 380.5975547666.

The spelling of 55131268 in words is "fifty-five million, one hundred thirty-one thousand, two hundred sixty-eight".