340255021 has 4 divisors (see below), whose sum is σ = 358163200. Its totient is φ = 322346844.

The previous prime is 340255007. The next prime is 340255033. The reversal of 340255021 is 120552043.

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.

It is a cyclic number.

It is not a de Polignac number, because 340255021 - 2⁵ = 340254989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340254983 and 340255001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340255061) 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, 8954061 + ... + 8954098.

It is an arithmetic number, because the mean of its divisors is an integer number (89540800).

Almost surely, 2^340255021 is an apocalyptic number.

It is an amenable number.

340255021 is a deficient number, since it is larger than the sum of its proper divisors (17908179).

340255021 is a wasteful number, since it uses less digits than its factorization.

340255021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17908178.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 340255021 is about 18446.0028461453. The cubic root of 340255021 is about 698.1276637506.

The spelling of 340255021 in words is "three hundred forty million, two hundred fifty-five thousand, twenty-one".