401433231 has 4 divisors (see below), whose sum is σ = 535244312. Its totient is φ = 267622152.

The previous prime is 401433211. The next prime is 401433269. The reversal of 401433231 is 132334104.

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

It is not a de Polignac number, because 401433231 - 2⁵ = 401433199 is a prime.

It is a super-2 number, since 2×401433231² = 322297277902198722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401433198 and 401433207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401433211) 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, 66905536 + ... + 66905541.

It is an arithmetic number, because the mean of its divisors is an integer number (133811078).

Almost surely, 2^401433231 is an apocalyptic number.

401433231 is a deficient number, since it is larger than the sum of its proper divisors (133811081).

401433231 is a wasteful number, since it uses less digits than its factorization.

401433231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133811080.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 401433231 is about 20035.7987362621. The cubic root of 401433231 is about 737.6852621238.

Adding to 401433231 its reverse (132334104), we get a palindrome (533767335).

The spelling of 401433231 in words is "four hundred one million, four hundred thirty-three thousand, two hundred thirty-one".