401133431 has 4 divisors (see below), whose sum is σ = 402086664. Its totient is φ = 400180200.

The previous prime is 401133379. The next prime is 401133487. The reversal of 401133431 is 134331104.

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

It is a cyclic number.

It is not a de Polignac number, because 401133431 - 2⁶ = 401133367 is a prime.

It is a super-4 number, since 4×401133431⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401133631) 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, 475985 + ... + 476826.

It is an arithmetic number, because the mean of its divisors is an integer number (100521666).

Almost surely, 2^401133431 is an apocalyptic number.

401133431 is a deficient number, since it is larger than the sum of its proper divisors (953233).

401133431 is an equidigital number, since it uses as much as digits as its factorization.

401133431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953232.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 401133431 is about 20028.3157304852. The cubic root of 401133431 is about 737.5015760188.

Adding to 401133431 its reverse (134331104), we get a palindrome (535464535).

The spelling of 401133431 in words is "four hundred one million, one hundred thirty-three thousand, four hundred thirty-one".