40423155 has 8 divisors (see below), whose sum is σ = 64677072. Its totient is φ = 21559008.

The previous prime is 40423147. The next prime is 40423181. The reversal of 40423155 is 55132404.

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

It is not a de Polignac number, because 40423155 - 2³ = 40423147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1347424 + ... + 1347453.

It is an arithmetic number, because the mean of its divisors is an integer number (8084634).

Almost surely, 2^40423155 is an apocalyptic number.

40423155 is a deficient number, since it is larger than the sum of its proper divisors (24253917).

40423155 is a wasteful number, since it uses less digits than its factorization.

40423155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694885.

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

The square root of 40423155 is about 6357.9206506530. The cubic root of 40423155 is about 343.1969363211.

Adding to 40423155 its reverse (55132404), we get a palindrome (95555559).

The spelling of 40423155 in words is "forty million, four hundred twenty-three thousand, one hundred fifty-five".