56021623 has 4 divisors (see below), whose sum is σ = 64024720. Its totient is φ = 48018528.

The previous prime is 56021599. The next prime is 56021639. The reversal of 56021623 is 32612065.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32612065 = 5 ⋅6522413.

It is a cyclic number.

It is not a de Polignac number, because 56021623 - 2⁹ = 56021111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56021023) 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, 4001538 + ... + 4001551.

It is an arithmetic number, because the mean of its divisors is an integer number (16006180).

Almost surely, 2^56021623 is an apocalyptic number.

56021623 is a deficient number, since it is larger than the sum of its proper divisors (8003097).

56021623 is an equidigital number, since it uses as much as digits as its factorization.

56021623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8003096.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 56021623 is about 7484.7593815700. The cubic root of 56021623 is about 382.6354722548.

Adding to 56021623 its reverse (32612065), we get a palindrome (88633688).

It can be divided in two parts, 56021 and 623, that added together give a square (56644 = 238²).

The spelling of 56021623 in words is "fifty-six million, twenty-one thousand, six hundred twenty-three".