55115507 has 2 divisors, whose sum is σ = 55115508. Its totient is φ = 55115506.

The previous prime is 55115503. The next prime is 55115527. The reversal of 55115507 is 70551155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55115507 - 2² = 55115503 is a prime.

It is a super-2 number, since 2×55115507² = 6075438223734098, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55115507.

It is not a weakly prime, because it can be changed into another prime (55115503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27557753 + 27557754.

It is an arithmetic number, because the mean of its divisors is an integer number (27557754).

Almost surely, 2^55115507 is an apocalyptic number.

55115507 is a deficient number, since it is larger than the sum of its proper divisors (1).

55115507 is an equidigital number, since it uses as much as digits as its factorization.

55115507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4375, while the sum is 29.

The square root of 55115507 is about 7423.9818830598. The cubic root of 55115507 is about 380.5612827320.

The spelling of 55115507 in words is "fifty-five million, one hundred fifteen thousand, five hundred seven".