40203187251 has 4 divisors (see below), whose sum is σ = 53604249672. Its totient is φ = 26802124832.

The previous prime is 40203187243. The next prime is 40203187303. The reversal of 40203187251 is 15278130204.

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 40203187251 - 2³ = 40203187243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40203187201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6700531206 + ... + 6700531211.

It is an arithmetic number, because the mean of its divisors is an integer number (13401062418).

Almost surely, 2^40203187251 is an apocalyptic number.

40203187251 is a deficient number, since it is larger than the sum of its proper divisors (13401062421).

40203187251 is a wasteful number, since it uses less digits than its factorization.

40203187251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13401062420.

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 40203187251 in words is "forty billion, two hundred three million, one hundred eighty-seven thousand, two hundred fifty-one".