401542223 has 4 divisors (see below), whose sum is σ = 405095808. Its totient is φ = 397988640.

The previous prime is 401542201. The next prime is 401542231. The reversal of 401542223 is 322245104.

It is a happy number.

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 401542223 - 2⁸ = 401541967 is a prime.

It is a super-2 number, since 2×401542223² = 322472313703563458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401542423) 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, 1776623 + ... + 1776848.

It is an arithmetic number, because the mean of its divisors is an integer number (101273952).

Almost surely, 2^401542223 is an apocalyptic number.

401542223 is a deficient number, since it is larger than the sum of its proper divisors (3553585).

401542223 is a wasteful number, since it uses less digits than its factorization.

401542223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553584.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 401542223 is about 20038.5184831614. The cubic root of 401542223 is about 737.7520183616.

Adding to 401542223 its reverse (322245104), we get a palindrome (723787327).

The spelling of 401542223 in words is "four hundred one million, five hundred forty-two thousand, two hundred twenty-three".