55442503 has 8 divisors (see below), whose sum is σ = 55972800. Its totient is φ = 54915168.

The previous prime is 55442501. The next prime is 55442507. The reversal of 55442503 is 30524455.

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 55442503 - 2¹ = 55442501 is a prime.

It is a super-2 number, since 2×55442503² = 6147742277810018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55442501) 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, 54225 + ... + 55237.

It is an arithmetic number, because the mean of its divisors is an integer number (6996600).

Almost surely, 2^55442503 is an apocalyptic number.

55442503 is a deficient number, since it is larger than the sum of its proper divisors (530297).

55442503 is a wasteful number, since it uses less digits than its factorization.

55442503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 55442503 is about 7445.9722669373. The cubic root of 55442503 is about 381.3124126792.

Adding to 55442503 its reverse (30524455), we get a palindrome (85966958).

It can be divided in two parts, 55442 and 503, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 55442503 in words is "fifty-five million, four hundred forty-two thousand, five hundred three".