40221471 has 4 divisors (see below), whose sum is σ = 53628632. Its totient is φ = 26814312.

The previous prime is 40221443. The next prime is 40221481. The reversal of 40221471 is 17412204.

It is a happy number.

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

It is not a de Polignac number, because 40221471 - 2⁷ = 40221343 is a prime.

It is a super-3 number, since 3×40221471³ (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 (40221431) 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, 6703576 + ... + 6703581.

It is an arithmetic number, because the mean of its divisors is an integer number (13407158).

Almost surely, 2^40221471 is an apocalyptic number.

40221471 is a deficient number, since it is larger than the sum of its proper divisors (13407161).

40221471 is a wasteful number, since it uses less digits than its factorization.

40221471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13407160.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 40221471 is about 6342.0399714918. The cubic root of 40221471 is about 342.6252114699.

Adding to 40221471 its reverse (17412204), we get a palindrome (57633675).

The spelling of 40221471 in words is "forty million, two hundred twenty-one thousand, four hundred seventy-one".