401181523 has 4 divisors (see below), whose sum is σ = 422296360. Its totient is φ = 380066688.

The previous prime is 401181511. The next prime is 401181577. The reversal of 401181523 is 325181104.

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-401181523 is a prime.

It is a super-2 number, since 2×401181523² = 321893228793199058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401151523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10557390 + ... + 10557427.

It is an arithmetic number, because the mean of its divisors is an integer number (105574090).

Almost surely, 2^401181523 is an apocalyptic number.

401181523 is a deficient number, since it is larger than the sum of its proper divisors (21114837).

401181523 is a wasteful number, since it uses less digits than its factorization.

401181523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21114836.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 401181523 is about 20029.5162947087. The cubic root of 401181523 is about 737.5310479316.

The spelling of 401181523 in words is "four hundred one million, one hundred eighty-one thousand, five hundred twenty-three".