55440537 has 16 divisors (see below), whose sum is σ = 78063360. Its totient is φ = 34901712.

The previous prime is 55440533. The next prime is 55440559. The reversal of 55440537 is 73504455.

It is not a de Polignac number, because 55440537 - 2² = 55440533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55440498 and 55440507.

It is not an unprimeable number, because it can be changed into a prime (55440533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18378 + ... + 21180.

It is an arithmetic number, because the mean of its divisors is an integer number (4878960).

Almost surely, 2^55440537 is an apocalyptic number.

55440537 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

55440537 is a deficient number, since it is larger than the sum of its proper divisors (22622823).

55440537 is a wasteful number, since it uses less digits than its factorization.

55440537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3172.

The product of its (nonzero) digits is 42000, while the sum is 33.

The square root of 55440537 is about 7445.8402480848. The cubic root of 55440537 is about 381.3079054930.

The spelling of 55440537 in words is "fifty-five million, four hundred forty thousand, five hundred thirty-seven".