340341320421 has 6 divisors (see below), whose sum is σ = 491604129510. Its totient is φ = 226894213608.

The previous prime is 340341320419. The next prime is 340341320503. The reversal of 340341320421 is 124023143043.

340341320421 is a `hidden beast` number, since 3 + 40 + 3 + 413 + 204 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 298279822500 + 42061497921 = 546150^2 + 205089^2 .

It is not a de Polignac number, because 340341320421 - 2¹ = 340341320419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340341320411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18907851126 + ... + 18907851143.

It is an arithmetic number, because the mean of its divisors is an integer number (81934021585).

Almost surely, 2^340341320421 is an apocalyptic number.

It is an amenable number.

340341320421 is a deficient number, since it is larger than the sum of its proper divisors (151262809089).

340341320421 is a wasteful number, since it uses less digits than its factorization.

340341320421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37815702275 (or 37815702272 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 340341320421 its reverse (124023143043), we get a palindrome (464364463464).

The spelling of 340341320421 in words is "three hundred forty billion, three hundred forty-one million, three hundred twenty thousand, four hundred twenty-one".