34215021 has 8 divisors (see below), whose sum is σ = 50688960. Its totient is φ = 22809996.

The previous prime is 34215017. The next prime is 34215023. The reversal of 34215021 is 12051243.

It is not a de Polignac number, because 34215021 - 2² = 34215017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 34214985 and 34215003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34215023) 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, 633585 + ... + 633638.

It is an arithmetic number, because the mean of its divisors is an integer number (6336120).

Almost surely, 2^34215021 is an apocalyptic number.

It is an amenable number.

34215021 is a deficient number, since it is larger than the sum of its proper divisors (16473939).

34215021 is a wasteful number, since it uses less digits than its factorization.

34215021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267232 (or 1267226 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 34215021 is about 5849.3607343025. The cubic root of 34215021 is about 324.6426715712.

Adding to 34215021 its reverse (12051243), we get a palindrome (46266264).

The spelling of 34215021 in words is "thirty-four million, two hundred fifteen thousand, twenty-one".