340440133421 has 12 divisors (see below), whose sum is σ = 359387185212. Its totient is φ = 322444943424.

The previous prime is 340440133403. The next prime is 340440133487. The reversal of 340440133421 is 124331044043.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 155957857225 + 184482276196 = 394915^2 + 429514^2 .

It is a de Polignac number, because none of the positive numbers 2^k-340440133421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340440193421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1424465 + ... + 1646201.

It is an arithmetic number, because the mean of its divisors is an integer number (29948932101).

Almost surely, 2^340440133421 is an apocalyptic number.

It is an amenable number.

340440133421 is a deficient number, since it is larger than the sum of its proper divisors (18947051791).

340440133421 is a wasteful number, since it uses less digits than its factorization.

340440133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226028 (or 226009 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 340440133421 its reverse (124331044043), we get a palindrome (464771177464).

The spelling of 340440133421 in words is "three hundred forty billion, four hundred forty million, one hundred thirty-three thousand, four hundred twenty-one".