400140430215 has 16 divisors (see below), whose sum is σ = 643095656448. Its totient is φ = 212451240096.

The previous prime is 400140430213. The next prime is 400140430241. The reversal of 400140430215 is 512034041004.

It is not a de Polignac number, because 400140430215 - 2¹ = 400140430213 is a prime.

It is a super-2 number, since 2×400140430215² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400140430211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59808379 + ... + 59815068.

It is an arithmetic number, because the mean of its divisors is an integer number (40193478528).

Almost surely, 2^400140430215 is an apocalyptic number.

400140430215 is a deficient number, since it is larger than the sum of its proper divisors (242955226233).

400140430215 is a wasteful number, since it uses less digits than its factorization.

400140430215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119623678.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 400140430215 its reverse (512034041004), we get a palindrome (912174471219).

The spelling of 400140430215 in words is "four hundred billion, one hundred forty million, four hundred thirty thousand, two hundred fifteen".