40240043105251 has 32 divisors (see below), whose sum is σ = 46072277471232. Its totient is φ = 34810009200000.

The previous prime is 40240043105243. The next prime is 40240043105257. The reversal of 40240043105251 is 15250134004204.

It is a cyclic number.

It is not a de Polignac number, because 40240043105251 - 2³ = 40240043105243 is a prime.

It is a super-2 number, since 2×40240043105251² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (40240043105257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63355866 + ... + 63987856.

It is an arithmetic number, because the mean of its divisors is an integer number (1439758670976).

Almost surely, 2^{40240043105251} is an apocalyptic number.

40240043105251 is a deficient number, since it is larger than the sum of its proper divisors (5832234365981).

40240043105251 is a wasteful number, since it uses less digits than its factorization.

40240043105251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635155.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 40240043105251 its reverse (15250134004204), we get a palindrome (55490177109455).

The spelling of 40240043105251 in words is "forty trillion, two hundred forty billion, forty-three million, one hundred five thousand, two hundred fifty-one".