400435520122431 has 12 divisors (see below), whose sum is σ = 578407156596360. Its totient is φ = 266956877631600.

The previous prime is 400435520122411. The next prime is 400435520122493. The reversal of 400435520122431 is 134221025534004.

It is a happy number.

400435520122431 is a `hidden beast` number, since 4 + 0 + 0 + 4 + 3 + 5 + 520 + 122 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 400435520122431 - 2¹⁵ = 400435520089663 is a prime.

It is a super-2 number, since 2×400435520122431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400435520122411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9348256 + ... + 29803706.

It is an arithmetic number, because the mean of its divisors is an integer number (48200596383030).

Almost surely, 2^{400435520122431} is an apocalyptic number.

400435520122431 is a deficient number, since it is larger than the sum of its proper divisors (177971636473929).

400435520122431 is a wasteful number, since it uses less digits than its factorization.

400435520122431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22630566 (or 22630563 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 400435520122431 its reverse (134221025534004), we get a palindrome (534656545656435).

The spelling of 400435520122431 in words is "four hundred trillion, four hundred thirty-five billion, five hundred twenty million, one hundred twenty-two thousand, four hundred thirty-one".