55243743 has 16 divisors (see below), whose sum is σ = 74807040. Its totient is φ = 36259776.

The previous prime is 55243733. The next prime is 55243763. The reversal of 55243743 is 34734255.

It is a de Polignac number, because none of the positive numbers 2^k-55243743 is a prime.

It is a super-2 number, since 2×55243743² = 6103742281300098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55243703) 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, 56646 + ... + 57612.

It is an arithmetic number, because the mean of its divisors is an integer number (4675440).

Almost surely, 2^55243743 is an apocalyptic number.

55243743 is a deficient number, since it is larger than the sum of its proper divisors (19563297).

55243743 is a wasteful number, since it uses less digits than its factorization.

55243743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246.

The product of its digits is 50400, while the sum is 33.

The square root of 55243743 is about 7432.6134703750. The cubic root of 55243743 is about 380.8562018911.

Adding to 55243743 its reverse (34734255), we get a palindrome (89977998).

The spelling of 55243743 in words is "fifty-five million, two hundred forty-three thousand, seven hundred forty-three".