56553403 has 4 divisors (see below), whose sum is σ = 56639880. Its totient is φ = 56466928.

The previous prime is 56553383. The next prime is 56553421. The reversal of 56553403 is 30435565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30435565 = 5 ⋅6087113.

It is a cyclic number.

It is not a de Polignac number, because 56553403 - 2¹³ = 56545211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56553433) 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, 42250 + ... + 43567.

It is an arithmetic number, because the mean of its divisors is an integer number (14159970).

Almost surely, 2^56553403 is an apocalyptic number.

56553403 is a deficient number, since it is larger than the sum of its proper divisors (86477).

56553403 is an equidigital number, since it uses as much as digits as its factorization.

56553403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86476.

The product of its (nonzero) digits is 27000, while the sum is 31.

The square root of 56553403 is about 7520.1996649025. The cubic root of 56553403 is about 383.8423719180.

Adding to 56553403 its reverse (30435565), we get a palindrome (86988968).

The spelling of 56553403 in words is "fifty-six million, five hundred fifty-three thousand, four hundred three".