55443771 has 20 divisors (see below), whose sum is σ = 83054400. Its totient is φ = 36859536.

The previous prime is 55443743. The next prime is 55443793. The reversal of 55443771 is 17734455.

It is a happy number.

55443771 is a `hidden beast` number, since 554 + 4 + 37 + 71 = 666.

It is not a de Polignac number, because 55443771 - 2⁷ = 55443643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55443071) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38085 + ... + 39513.

It is an arithmetic number, because the mean of its divisors is an integer number (4152720).

Almost surely, 2^55443771 is an apocalyptic number.

55443771 is a deficient number, since it is larger than the sum of its proper divisors (27610629).

55443771 is a wasteful number, since it uses less digits than its factorization.

55443771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920 (or 1911 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 55443771 is about 7446.0574131550. The cubic root of 55443771 is about 381.3153195974.

The spelling of 55443771 in words is "fifty-five million, four hundred forty-three thousand, seven hundred seventy-one".