55279845 has 12 divisors (see below), whose sum is σ = 95818476. Its totient is φ = 29482560.

The previous prime is 55279843. The next prime is 55279867. The reversal of 55279845 is 54897255.

55279845 is a `hidden beast` number, since 552 + 7 + 98 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 36978561 + 18301284 = 6081^2 + 4278^2 .

It is not a de Polignac number, because 55279845 - 2¹ = 55279843 is a prime.

It is a super-2 number, since 2×55279845² = 6111722526448050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1228441 = 55279845 / (5 + 5 + 2 + 7 + 9 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 55279845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55279843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 614176 + ... + 614265.

It is an arithmetic number, because the mean of its divisors is an integer number (7984873).

Almost surely, 2^55279845 is an apocalyptic number.

It is an amenable number.

55279845 is a deficient number, since it is larger than the sum of its proper divisors (40538631).

55279845 is a wasteful number, since it uses less digits than its factorization.

55279845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228452 (or 1228449 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 55279845 is about 7435.0416945704. The cubic root of 55279845 is about 380.9391474929.

The spelling of 55279845 in words is "fifty-five million, two hundred seventy-nine thousand, eight hundred forty-five".