340401431421 has 16 divisors (see below), whose sum is σ = 533963030400. Its totient is φ = 213585211584.

The previous prime is 340401431413. The next prime is 340401431479. The reversal of 340401431421 is 124134104043.

340401431421 is a `hidden beast` number, since 340 + 4 + 0 + 1 + 4 + 314 + 2 + 1 = 666.

It is not a de Polignac number, because 340401431421 - 2³ = 340401431413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340401431021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370807201 + ... + 370808118.

It is an arithmetic number, because the mean of its divisors is an integer number (33372689400).

Almost surely, 2^340401431421 is an apocalyptic number.

It is an amenable number.

340401431421 is a deficient number, since it is larger than the sum of its proper divisors (193561598979).

340401431421 is a wasteful number, since it uses less digits than its factorization.

340401431421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741615345 (or 741615339 counting only the distinct ones).

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

Adding to 340401431421 its reverse (124134104043), we get a palindrome (464535535464).

The spelling of 340401431421 in words is "three hundred forty billion, four hundred one million, four hundred thirty-one thousand, four hundred twenty-one".