342215021 has 8 divisors (see below), whose sum is σ = 347301240. Its totient is φ = 337139712.

The previous prime is 342215017. The next prime is 342215033. The reversal of 342215021 is 120512243.

It can be written as a sum of positive squares in 4 ways, for example, as 251222500 + 90992521 = 15850^2 + 9539^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 342215021 - 2² = 342215017 is a prime.

It is a super-2 number, since 2×342215021² = 234222241196060882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 342214984 and 342215002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342214021) 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, 77645 + ... + 81933.

It is an arithmetic number, because the mean of its divisors is an integer number (43412655).

Almost surely, 2^342215021 is an apocalyptic number.

It is an amenable number.

342215021 is a deficient number, since it is larger than the sum of its proper divisors (5086219).

342215021 is a wasteful number, since it uses less digits than its factorization.

342215021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5455.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 342215021 is about 18499.0545974652. The cubic root of 342215021 is about 699.4655927969.

Adding to 342215021 its reverse (120512243), we get a palindrome (462727264).

The spelling of 342215021 in words is "three hundred forty-two million, two hundred fifteen thousand, twenty-one".