421131403440 has 120 divisors (see below), whose sum is σ = 1542872352528. Its totient is φ = 102092459520.

The previous prime is 421131403417. The next prime is 421131403489. The reversal of 421131403440 is 44304131124.

421131403440 is a `hidden beast` number, since 4 + 2 + 1 + 1 + 314 + 0 + 344 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26578659 + ... + 26594498.

Almost surely, 2^421131403440 is an apocalyptic number.

421131403440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421131403440 is an abundant number, since it is smaller than the sum of its proper divisors (1121740949088).

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

421131403440 is a wasteful number, since it uses less digits than its factorization.

421131403440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53173187 (or 53173178 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 421131403440 its reverse (44304131124), we get a palindrome (465435534564).

The spelling of 421131403440 in words is "four hundred twenty-one billion, one hundred thirty-one million, four hundred three thousand, four hundred forty".