55244431 has 4 divisors (see below), whose sum is σ = 60266664. Its totient is φ = 50222200.

The previous prime is 55244417. The next prime is 55244437. The reversal of 55244431 is 13444255.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55244431 is a prime.

It is a super-2 number, since 2×55244431² = 6103894313027522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55244431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55244437) 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, 2511100 + ... + 2511121.

It is an arithmetic number, because the mean of its divisors is an integer number (15066666).

Almost surely, 2^55244431 is an apocalyptic number.

55244431 is a deficient number, since it is larger than the sum of its proper divisors (5022233).

55244431 is a wasteful number, since it uses less digits than its factorization.

55244431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5022232.

The product of its digits is 9600, while the sum is 28.

The square root of 55244431 is about 7432.6597527399. The cubic root of 55244431 is about 380.8577829328.

Adding to 55244431 its reverse (13444255), we get a palindrome (68688686).

The spelling of 55244431 in words is "fifty-five million, two hundred forty-four thousand, four hundred thirty-one".