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34215921 = 323801769
BaseRepresentation
bin1000001010000…
…1011111110001
32101101100102100
42002201133301
532224402141
63221211013
7563554605
oct202413761
971340370
1034215921
111834aa23
12b560a69
13711cc0c
144789505
15300d0b6
hex20a17f1

34215921 has 6 divisors (see below), whose sum is σ = 49423010. Its totient is φ = 22810608.

The previous prime is 34215919. The next prime is 34215943. The reversal of 34215921 is 12951243.

It can be written as a sum of positive squares in only one way, i.e., 28740321 + 5475600 = 5361^2 + 2340^2 .

It is not a de Polignac number, because 34215921 - 21 = 34215919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34215721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1900876 + ... + 1900893.

Almost surely, 234215921 is an apocalyptic number.

It is an amenable number.

34215921 is a deficient number, since it is larger than the sum of its proper divisors (15207089).

34215921 is a wasteful number, since it uses less digits than its factorization.

34215921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801775 (or 3801772 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 34215921 is about 5849.4376652803. The cubic root of 34215921 is about 324.6455180387.

The spelling of 34215921 in words is "thirty-four million, two hundred fifteen thousand, nine hundred twenty-one".

Divisors: 1 3 9 3801769 11405307 34215921