401440532421 has 8 divisors (see below), whose sum is σ = 537386530464. Its totient is φ = 266560778000.

The previous prime is 401440532419. The next prime is 401440532429. The reversal of 401440532421 is 124235044104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401440532421 - 2¹ = 401440532419 is a prime.

It is a super-2 number, since 2×401440532421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401440532429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266560026 + ... + 266561531.

It is an arithmetic number, because the mean of its divisors is an integer number (67173316308).

Almost surely, 2^401440532421 is an apocalyptic number.

It is an amenable number.

401440532421 is a deficient number, since it is larger than the sum of its proper divisors (135945998043).

401440532421 is a wasteful number, since it uses less digits than its factorization.

401440532421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533121811.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 401440532421 its reverse (124235044104), we get a palindrome (525675576525).

The spelling of 401440532421 in words is "four hundred one billion, four hundred forty million, five hundred thirty-two thousand, four hundred twenty-one".