56571401 has 4 divisors (see below), whose sum is σ = 56652804. Its totient is φ = 56490000.

The previous prime is 56571391. The next prime is 56571419. The reversal of 56571401 is 10417565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10417565 = 5 ⋅2083513.

It can be written as a sum of positive squares in 2 ways, for example, as 45549001 + 11022400 = 6749^2 + 3320^2 .

It is a cyclic number.

It is not a de Polignac number, because 56571401 - 2¹⁰ = 56570377 is a prime.

It is a super-2 number, since 2×56571401² = 6400646822205602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56571491) 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, 39650 + ... + 41051.

It is an arithmetic number, because the mean of its divisors is an integer number (14163201).

Almost surely, 2^56571401 is an apocalyptic number.

It is an amenable number.

56571401 is a deficient number, since it is larger than the sum of its proper divisors (81403).

56571401 is an equidigital number, since it uses as much as digits as its factorization.

56571401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81402.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 56571401 is about 7521.3962134699. The cubic root of 56571401 is about 383.8830866048.

Adding to 56571401 its reverse (10417565), we get a palindrome (66988966).

The spelling of 56571401 in words is "fifty-six million, five hundred seventy-one thousand, four hundred one".