55390515 has 8 divisors (see below), whose sum is σ = 88624848. Its totient is φ = 29541600.

The previous prime is 55390507. The next prime is 55390523. The reversal of 55390515 is 51509355.

55390515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55390507) and next prime (55390523).

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

It is not a de Polignac number, because 55390515 - 2³ = 55390507 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1846336 + ... + 1846365.

It is an arithmetic number, because the mean of its divisors is an integer number (11078106).

Almost surely, 2^55390515 is an apocalyptic number.

55390515 is a deficient number, since it is larger than the sum of its proper divisors (33234333).

55390515 is a wasteful number, since it uses less digits than its factorization.

55390515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3692709.

The product of its (nonzero) digits is 16875, while the sum is 33.

The square root of 55390515 is about 7442.4804332964. The cubic root of 55390515 is about 381.1931908546.

The spelling of 55390515 in words is "fifty-five million, three hundred ninety thousand, five hundred fifteen".