40256471 has 4 divisors (see below), whose sum is σ = 41192712. Its totient is φ = 39320232.

The previous prime is 40256429. The next prime is 40256477. The reversal of 40256471 is 17465204.

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

It is not a de Polignac number, because 40256471 - 2¹⁰ = 40255447 is a prime.

It is a super-3 number, since 3×40256471³ (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 (40256477) 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, 468056 + ... + 468141.

It is an arithmetic number, because the mean of its divisors is an integer number (10298178).

Almost surely, 2^40256471 is an apocalyptic number.

40256471 is a deficient number, since it is larger than the sum of its proper divisors (936241).

40256471 is an equidigital number, since it uses as much as digits as its factorization.

40256471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936240.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 40256471 is about 6344.7987359726. The cubic root of 40256471 is about 342.7245647541.

The spelling of 40256471 in words is "forty million, two hundred fifty-six thousand, four hundred seventy-one".