40031421 has 8 divisors (see below), whose sum is σ = 53422080. Its totient is φ = 26664192.

The previous prime is 40031419. The next prime is 40031473. The reversal of 40031421 is 12413004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40031421 - 2¹ = 40031419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40031421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40031401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1380 + ... + 9053.

It is an arithmetic number, because the mean of its divisors is an integer number (6677760).

Almost surely, 2^40031421 is an apocalyptic number.

It is an amenable number.

40031421 is a deficient number, since it is larger than the sum of its proper divisors (13390659).

40031421 is a wasteful number, since it uses less digits than its factorization.

40031421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11715.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 40031421 is about 6327.0388808668. The cubic root of 40031421 is about 342.0847144884.

Adding to 40031421 its reverse (12413004), we get a palindrome (52444425).

The spelling of 40031421 in words is "forty million, thirty-one thousand, four hundred twenty-one".