56506919 has 4 divisors (see below), whose sum is σ = 64579344. Its totient is φ = 48434496.

The previous prime is 56506913. The next prime is 56506937. The reversal of 56506919 is 91960565.

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

It is a cyclic number.

It is not a de Polignac number, because 56506919 - 2⁴ = 56506903 is a prime.

It is a super-2 number, since 2×56506919² = 6386063789745122, 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 (56506913) 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, 4036202 + ... + 4036215.

It is an arithmetic number, because the mean of its divisors is an integer number (16144836).

Almost surely, 2^56506919 is an apocalyptic number.

56506919 is a deficient number, since it is larger than the sum of its proper divisors (8072425).

56506919 is an equidigital number, since it uses as much as digits as its factorization.

56506919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8072424.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 56506919 is about 7517.1084201307. The cubic root of 56506919 is about 383.7371768360.

The spelling of 56506919 in words is "fifty-six million, five hundred six thousand, nine hundred nineteen".