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2505213 = 321731609
BaseRepresentation
bin1001100011100111111101
311201021111200
421203213331
51120131323
6125410113
730202554
oct11434775
94637450
102505213
111461227
12a09939
13699399
14492d9b
15347443
hex2639fd

2505213 has 12 divisors (see below), whose sum is σ = 3641820. Its totient is φ = 1659456.

The previous prime is 2505193. The next prime is 2505227. The reversal of 2505213 is 3125052.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2377764 + 127449 = 1542^2 + 357^2 .

It is not a de Polignac number, because 2505213 - 210 = 2504189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 753 + ... + 2361.

It is an arithmetic number, because the mean of its divisors is an integer number (303485).

22505213 is an apocalyptic number.

It is an amenable number.

2505213 is a deficient number, since it is larger than the sum of its proper divisors (1136607).

2505213 is a wasteful number, since it uses less digits than its factorization.

2505213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788 (or 1785 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 2505213 is about 1582.7864669626. The cubic root of 2505213 is about 135.8151503967.

The spelling of 2505213 in words is "two million, five hundred five thousand, two hundred thirteen".

Divisors: 1 3 9 173 519 1557 1609 4827 14481 278357 835071 2505213