55040249 has 4 divisors (see below), whose sum is σ = 60043920. Its totient is φ = 50036580.

The previous prime is 55040233. The next prime is 55040261. The reversal of 55040249 is 94204055.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55040249 - 2⁴ = 55040233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55043249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2501819 + ... + 2501840.

It is an arithmetic number, because the mean of its divisors is an integer number (15010980).

Almost surely, 2^55040249 is an apocalyptic number.

It is an amenable number.

55040249 is a deficient number, since it is larger than the sum of its proper divisors (5003671).

55040249 is a wasteful number, since it uses less digits than its factorization.

55040249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003670.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55040249 is about 7418.9115778529. The cubic root of 55040249 is about 380.3879901435.

The spelling of 55040249 in words is "fifty-five million, forty thousand, two hundred forty-nine".