401232511 has 4 divisors (see below), whose sum is σ = 401326992. Its totient is φ = 401138032.

The previous prime is 401232479. The next prime is 401232553. The reversal of 401232511 is 115232104.

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 401232511 - 2⁵ = 401232479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401238511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40555 + ... + 49468.

It is an arithmetic number, because the mean of its divisors is an integer number (100331748).

Almost surely, 2^401232511 is an apocalyptic number.

401232511 is a deficient number, since it is larger than the sum of its proper divisors (94481).

401232511 is an equidigital number, since it uses as much as digits as its factorization.

401232511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94480.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 401232511 is about 20030.7890758203. The cubic root of 401232511 is about 737.5622920093.

Adding to 401232511 its reverse (115232104), we get a palindrome (516464615).

The spelling of 401232511 in words is "four hundred one million, two hundred thirty-two thousand, five hundred eleven".