55047278 has 32 divisors (see below), whose sum is σ = 100366560. Its totient is φ = 22296960.

The previous prime is 55047271. The next prime is 55047281. The reversal of 55047278 is 87274055.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55047271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4976 + ... + 11612.

It is an arithmetic number, because the mean of its divisors is an integer number (3136455).

Almost surely, 2^55047278 is an apocalyptic number.

55047278 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

55047278 is a deficient number, since it is larger than the sum of its proper divisors (45319282).

55047278 is a wasteful number, since it uses less digits than its factorization.

55047278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6692.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 55047278 is about 7419.3852845098. The cubic root of 55047278 is about 380.4041821328.

The spelling of 55047278 in words is "fifty-five million, forty-seven thousand, two hundred seventy-eight".