55302690 has 16 divisors (see below), whose sum is σ = 132726528. Its totient is φ = 14747376.

The previous prime is 55302659. The next prime is 55302703. The reversal of 55302690 is 9620355.

55302690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55302690² = 6116775042472200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1843423 = 55302690 / (5 + 5 + 3 + 0 + 2 + 6 + 9 + 0).

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 921682 + ... + 921741.

It is an arithmetic number, because the mean of its divisors is an integer number (8295408).

Almost surely, 2^55302690 is an apocalyptic number.

55302690 is an abundant number, since it is smaller than the sum of its proper divisors (77423838).

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

55302690 is a wasteful number, since it uses less digits than its factorization.

55302690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843433.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 55302690 is about 7436.5778419916. The cubic root of 55302690 is about 380.9916160210.

The spelling of 55302690 in words is "fifty-five million, three hundred two thousand, six hundred ninety".