55042403 has 8 divisors (see below), whose sum is σ = 59385648. Its totient is φ = 50714784.

The previous prime is 55042399. The next prime is 55042423. The reversal of 55042403 is 30424055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55042403 - 2² = 55042399 is a prime.

It is a super-2 number, since 2×55042403² = 6059332256028818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55042423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4025 + ... + 11237.

It is an arithmetic number, because the mean of its divisors is an integer number (7423206).

Almost surely, 2^55042403 is an apocalyptic number.

55042403 is a deficient number, since it is larger than the sum of its proper divisors (4343245).

55042403 is a wasteful number, since it uses less digits than its factorization.

55042403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7813.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 55042403 is about 7419.0567459752. The cubic root of 55042403 is about 380.3929522397.

Adding to 55042403 its reverse (30424055), we get a palindrome (85466458).

The spelling of 55042403 in words is "fifty-five million, forty-two thousand, four hundred three".