401231432550 has 48 divisors (see below), whose sum is σ = 1071596569680. Its totient is φ = 98764659840.

The previous prime is 401231432533. The next prime is 401231432551. The reversal of 401231432550 is 55234132104.

It is a super-2 number, since 2×401231432550² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401231432551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102877905 + ... + 102881804.

It is an arithmetic number, because the mean of its divisors is an integer number (22324928535).

Almost surely, 2^401231432550 is an apocalyptic number.

401231432550 is an abundant number, since it is smaller than the sum of its proper divisors (670365137130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401231432550 is a wasteful number, since it uses less digits than its factorization.

401231432550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205759737 (or 205759732 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 401231432550 its reverse (55234132104), we get a palindrome (456465564654).

The spelling of 401231432550 in words is "four hundred one billion, two hundred thirty-one million, four hundred thirty-two thousand, five hundred fifty".