431401100240 has 40 divisors (see below), whose sum is σ = 1094190065568. Its totient is φ = 156873127040.

The previous prime is 431401100189. The next prime is 431401100243. The reversal of 431401100240 is 42001104134.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×431401100240² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431401100243) 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, 245113382 + ... + 245115141.

Almost surely, 2^431401100240 is an apocalyptic number.

431401100240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431401100240 is an abundant number, since it is smaller than the sum of its proper divisors (662788965328).

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

431401100240 is a wasteful number, since it uses less digits than its factorization.

431401100240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490228547 (or 490228541 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 431401100240 its reverse (42001104134), we get a palindrome (473402204374).

The spelling of 431401100240 in words is "four hundred thirty-one billion, four hundred one million, one hundred thousand, two hundred forty".