340211021 has 8 divisors (see below), whose sum is σ = 363413304. Its totient is φ = 317363200.

The previous prime is 340210999. The next prime is 340211033. The reversal of 340211021 is 120112043.

It can be written as a sum of positive squares in 4 ways, for example, as 546121 + 339664900 = 739^2 + 18430^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340211021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340210987 and 340211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340211821) 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, 86630 + ... + 90471.

It is an arithmetic number, because the mean of its divisors is an integer number (45426663).

Almost surely, 2^340211021 is an apocalyptic number.

It is an amenable number.

340211021 is a deficient number, since it is larger than the sum of its proper divisors (23202283).

340211021 is a wasteful number, since it uses less digits than its factorization.

340211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177231.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 340211021 is about 18444.8101372717. The cubic root of 340211021 is about 698.0975697138.

Adding to 340211021 its reverse (120112043), we get a palindrome (460323064).

The spelling of 340211021 in words is "three hundred forty million, two hundred eleven thousand, twenty-one".