55543877 has 2 divisors, whose sum is σ = 55543878. Its totient is φ = 55543876.

The previous prime is 55543861. The next prime is 55543937. The reversal of 55543877 is 77834555.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54184321 + 1359556 = 7361^2 + 1166^2 .

It is a cyclic number.

It is not a de Polignac number, because 55543877 - 2⁴ = 55543861 is a prime.

It is a super-2 number, since 2×55543877² = 6170244544382258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55543837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27771938 + 27771939.

It is an arithmetic number, because the mean of its divisors is an integer number (27771939).

Almost surely, 2^55543877 is an apocalyptic number.

It is an amenable number.

55543877 is a deficient number, since it is larger than the sum of its proper divisors (1).

55543877 is an equidigital number, since it uses as much as digits as its factorization.

55543877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 588000, while the sum is 44.

The square root of 55543877 is about 7452.7764625004. The cubic root of 55543877 is about 381.5446750930.

The spelling of 55543877 in words is "fifty-five million, five hundred forty-three thousand, eight hundred seventy-seven".