56220457 has 4 divisors (see below), whose sum is σ = 56239876. Its totient is φ = 56201040.

The previous prime is 56220443. The next prime is 56220491. The reversal of 56220457 is 75402265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75402265 = 5 ⋅15080453.

It can be written as a sum of positive squares in 2 ways, for example, as 45954841 + 10265616 = 6779^2 + 3204^2 .

It is a cyclic number.

It is not a de Polignac number, because 56220457 - 2¹⁹ = 55696169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56220557) 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, 4398 + ... + 11479.

It is an arithmetic number, because the mean of its divisors is an integer number (14059969).

Almost surely, 2^56220457 is an apocalyptic number.

It is an amenable number.

56220457 is a deficient number, since it is larger than the sum of its proper divisors (19419).

56220457 is a wasteful number, since it uses less digits than its factorization.

56220457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19418.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 56220457 is about 7498.0302079946. The cubic root of 56220457 is about 383.0876256956.

The spelling of 56220457 in words is "fifty-six million, two hundred twenty thousand, four hundred fifty-seven".