56405471 has 4 divisors (see below), whose sum is σ = 59374200. Its totient is φ = 53436744.

The previous prime is 56405467. The next prime is 56405477. The reversal of 56405471 is 17450465.

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 56405471 - 2² = 56405467 is a prime.

It is a super-3 number, since 3×56405471³ (a number of 24 digits) contains 333 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 (56405477) 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, 1484336 + ... + 1484373.

It is an arithmetic number, because the mean of its divisors is an integer number (14843550).

Almost surely, 2^56405471 is an apocalyptic number.

56405471 is a deficient number, since it is larger than the sum of its proper divisors (2968729).

56405471 is a wasteful number, since it uses less digits than its factorization.

56405471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2968728.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 56405471 is about 7510.3575813672. The cubic root of 56405471 is about 383.5073955988.

It can be divided in two parts, 5640 and 5471, that added together give a palindrome (11111).

The spelling of 56405471 in words is "fifty-six million, four hundred five thousand, four hundred seventy-one".