55715390 has 8 divisors (see below), whose sum is σ = 100287720. Its totient is φ = 22286152.

The previous prime is 55715389. The next prime is 55715417. The reversal of 55715390 is 9351755.

55715390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 55715390.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2785760 + ... + 2785779.

It is an arithmetic number, because the mean of its divisors is an integer number (12535965).

Almost surely, 2^55715390 is an apocalyptic number.

55715390 is a deficient number, since it is larger than the sum of its proper divisors (44572330).

55715390 is a wasteful number, since it uses less digits than its factorization.

55715390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571546.

The product of its (nonzero) digits is 23625, while the sum is 35.

The square root of 55715390 is about 7464.2742446939. The cubic root of 55715390 is about 381.9369933454.

Subtracting from 55715390 its reverse (9351755), we obtain a triangular number (46363635 = T₉₆₂₉).

The spelling of 55715390 in words is "fifty-five million, seven hundred fifteen thousand, three hundred ninety".