40351221707257 has 4 divisors (see below), whose sum is σ = 40364867710116. Its totient is φ = 40337575704400.

The previous prime is 40351221707231. The next prime is 40351221707263. The reversal of 40351221707257 is 75270712215304.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16030582600041 + 24320639107216 = 4003821^2 + 4931596^2 .

It is a cyclic number.

It is not a de Polignac number, because 40351221707257 - 2⁷ = 40351221707129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40351221707227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6822996994 + ... + 6823002907.

It is an arithmetic number, because the mean of its divisors is an integer number (10091216927529).

Almost surely, 2^{40351221707257} is an apocalyptic number.

It is an amenable number.

40351221707257 is a deficient number, since it is larger than the sum of its proper divisors (13646002859).

40351221707257 is a wasteful number, since it uses less digits than its factorization.

40351221707257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13646002858.

The product of its (nonzero) digits is 823200, while the sum is 46.

The spelling of 40351221707257 in words is "forty trillion, three hundred fifty-one billion, two hundred twenty-one million, seven hundred seven thousand, two hundred fifty-seven".