340214021 has 4 divisors (see below), whose sum is σ = 388816032. Its totient is φ = 291612012.

The previous prime is 340214011. The next prime is 340214029. The reversal of 340214021 is 120412043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120412043 = 859 ⋅140177.

It is a cyclic number.

It is not a de Polignac number, because 340214021 - 2⁶ = 340213957 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 (340214029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24300995 + ... + 24301008.

It is an arithmetic number, because the mean of its divisors is an integer number (97204008).

Almost surely, 2^340214021 is an apocalyptic number.

It is an amenable number.

340214021 is a deficient number, since it is larger than the sum of its proper divisors (48602011).

340214021 is an equidigital number, since it uses as much as digits as its factorization.

340214021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48602010.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 340214021 is about 18444.8914607812. The cubic root of 340214021 is about 698.0996216624.

Adding to 340214021 its reverse (120412043), we get a palindrome (460626064).

The spelling of 340214021 in words is "three hundred forty million, two hundred fourteen thousand, twenty-one".