40423551 has 16 divisors (see below), whose sum is σ = 62016000. Its totient is φ = 22942368.

The previous prime is 40423549. The next prime is 40423553. The reversal of 40423551 is 15532404.

It is an interprime number because it is at equal distance from previous prime (40423549) and next prime (40423553).

It is not a de Polignac number, because 40423551 - 2¹ = 40423549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3331 + ... + 9588.

It is an arithmetic number, because the mean of its divisors is an integer number (3876000).

Almost surely, 2^40423551 is an apocalyptic number.

40423551 is a deficient number, since it is larger than the sum of its proper divisors (21592449).

40423551 is a wasteful number, since it uses less digits than its factorization.

40423551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13078.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 40423551 is about 6357.9517928339. The cubic root of 40423551 is about 343.1980570116.

Adding to 40423551 its reverse (15532404), we get a palindrome (55955955).

The spelling of 40423551 in words is "forty million, four hundred twenty-three thousand, five hundred fifty-one".