42403553 has 4 divisors (see below), whose sum is σ = 43437828. Its totient is φ = 41369280.

The previous prime is 42403549. The next prime is 42403561. The reversal of 42403553 is 35530424.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18861649 + 23541904 = 4343^2 + 4852^2 .

It is a cyclic number.

It is not a de Polignac number, because 42403553 - 2² = 42403549 is a prime.

It is a super-2 number, since 2×42403553² = 3596122614047618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42409553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517076 + ... + 517157.

It is an arithmetic number, because the mean of its divisors is an integer number (10859457).

Almost surely, 2^42403553 is an apocalyptic number.

It is an amenable number.

42403553 is a deficient number, since it is larger than the sum of its proper divisors (1034275).

42403553 is a wasteful number, since it uses less digits than its factorization.

42403553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034274.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 42403553 is about 6511.8010565434. The cubic root of 42403553 is about 348.7124200802.

Adding to 42403553 its reverse (35530424), we get a palindrome (77933977).

The spelling of 42403553 in words is "forty-two million, four hundred three thousand, five hundred fifty-three".