55138437 has 24 divisors (see below), whose sum is σ = 84801600. Its totient is φ = 34423488.

The previous prime is 55138423. The next prime is 55138439. The reversal of 55138437 is 73483155.

It is not a de Polignac number, because 55138437 - 2²⁴ = 38361221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55138439) 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 23 ways as a sum of consecutive naturals, for example, 13408 + ... + 17030.

It is an arithmetic number, because the mean of its divisors is an integer number (3533400).

Almost surely, 2^55138437 is an apocalyptic number.

55138437 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

55138437 is a deficient number, since it is larger than the sum of its proper divisors (29663163).

55138437 is a wasteful number, since it uses less digits than its factorization.

55138437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737 (or 3734 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 55138437 is about 7425.5260419717. The cubic root of 55138437 is about 380.6140510654.

The spelling of 55138437 in words is "fifty-five million, one hundred thirty-eight thousand, four hundred thirty-seven".