55181437 has 4 divisors (see below), whose sum is σ = 55339900. Its totient is φ = 55022976.

The previous prime is 55181429. The next prime is 55181479. The reversal of 55181437 is 73418155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42889401 + 12292036 = 6549^2 + 3506^2 .

It is a cyclic number.

It is not a de Polignac number, because 55181437 - 2³ = 55181429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55181407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78708 + ... + 79405.

It is an arithmetic number, because the mean of its divisors is an integer number (13834975).

Almost surely, 2^55181437 is an apocalyptic number.

It is an amenable number.

55181437 is a deficient number, since it is larger than the sum of its proper divisors (158463).

55181437 is a wasteful number, since it uses less digits than its factorization.

55181437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158462.

The product of its digits is 16800, while the sum is 34.

The square root of 55181437 is about 7428.4208954528. The cubic root of 55181437 is about 380.7129666462.

The spelling of 55181437 in words is "fifty-five million, one hundred eighty-one thousand, four hundred thirty-seven".