55829881 has 2 divisors, whose sum is σ = 55829882. Its totient is φ = 55829880.

The previous prime is 55829869. The next prime is 55829897. The reversal of 55829881 is 18892855.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30074256 + 25755625 = 5484^2 + 5075^2 .

It is a cyclic number.

It is not a de Polignac number, because 55829881 - 2⁵ = 55829849 is a prime.

It is a super-2 number, since 2×55829881² = 6233951224948322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55829801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27914940 + 27914941.

It is an arithmetic number, because the mean of its divisors is an integer number (27914941).

Almost surely, 2^55829881 is an apocalyptic number.

It is an amenable number.

55829881 is a deficient number, since it is larger than the sum of its proper divisors (1).

55829881 is an equidigital number, since it uses as much as digits as its factorization.

55829881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 46.

The square root of 55829881 is about 7471.9395741668. The cubic root of 55829881 is about 382.1984317596.

The spelling of 55829881 in words is "fifty-five million, eight hundred twenty-nine thousand, eight hundred eighty-one".