40542343251 has 4 divisors (see below), whose sum is σ = 54056457672. Its totient is φ = 27028228832.

The previous prime is 40542343229. The next prime is 40542343253. The reversal of 40542343251 is 15234324504.

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

It is a cyclic number.

It is not a de Polignac number, because 40542343251 - 2¹³ = 40542335059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40542343253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6757057206 + ... + 6757057211.

It is an arithmetic number, because the mean of its divisors is an integer number (13514114418).

Almost surely, 2^40542343251 is an apocalyptic number.

40542343251 is a deficient number, since it is larger than the sum of its proper divisors (13514114421).

40542343251 is a wasteful number, since it uses less digits than its factorization.

40542343251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13514114420.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 40542343251 its reverse (15234324504), we get a palindrome (55776667755).

The spelling of 40542343251 in words is "forty billion, five hundred forty-two million, three hundred forty-three thousand, two hundred fifty-one".