401123135431 has 4 divisors (see below), whose sum is σ = 402181508200. Its totient is φ = 400064762664.

The previous prime is 401123135363. The next prime is 401123135461. The reversal of 401123135431 is 134531321104.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401123135431 is a prime.

It is a super-2 number, since 2×401123135431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401123135431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401123135461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529185816 + ... + 529186573.

It is an arithmetic number, because the mean of its divisors is an integer number (100545377050).

Almost surely, 2^401123135431 is an apocalyptic number.

401123135431 is a deficient number, since it is larger than the sum of its proper divisors (1058372769).

401123135431 is a wasteful number, since it uses less digits than its factorization.

401123135431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058372768.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 401123135431 its reverse (134531321104), we get a palindrome (535654456535).

The spelling of 401123135431 in words is "four hundred one billion, one hundred twenty-three million, one hundred thirty-five thousand, four hundred thirty-one".