55775445 has 16 divisors (see below), whose sum is σ = 97353792. Its totient is φ = 27042560.

The previous prime is 55775413. The next prime is 55775509. The reversal of 55775445 is 54457755.

It is a happy number.

It is not a de Polignac number, because 55775445 - 2⁵ = 55775413 is a prime.

It is a super-2 number, since 2×55775445² = 6221800529896050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55775397 and 55775406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168852 + ... + 169181.

It is an arithmetic number, because the mean of its divisors is an integer number (6084612).

Almost surely, 2^55775445 is an apocalyptic number.

55775445 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55775445 is a deficient number, since it is larger than the sum of its proper divisors (41578347).

55775445 is a wasteful number, since it uses less digits than its factorization.

55775445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338052.

The product of its digits is 490000, while the sum is 42.

The square root of 55775445 is about 7468.2959903850. The cubic root of 55775445 is about 382.0741726168.

The spelling of 55775445 in words is "fifty-five million, seven hundred seventy-five thousand, four hundred forty-five".