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213220412 = 22292241263
BaseRepresentation
bin11001011010101…
…11110000111100
3112212012201102022
430231113300330
5414041023122
633054015312
75166225566
oct1455276074
9485181368
10213220412
11aa3a2719
125b4a7538
1335235932
1420464336
1513abb642
hexcb57c3c

213220412 has 36 divisors (see below), whose sum is σ = 389525136. Its totient is φ = 102117120.

The previous prime is 213220411. The next prime is 213220421. The reversal of 213220412 is 214022312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213220411) 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, 810593 + ... + 810855.

Almost surely, 2213220412 is an apocalyptic number.

It is an amenable number.

213220412 is a deficient number, since it is larger than the sum of its proper divisors (176304724).

213220412 is a wasteful number, since it uses less digits than its factorization.

213220412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 213220412 is about 14602.0687575425. The cubic root of 213220412 is about 597.4151879759.

Adding to 213220412 its reverse (214022312), we get a palindrome (427242724).

The spelling of 213220412 in words is "two hundred thirteen million, two hundred twenty thousand, four hundred twelve".

Divisors: 1 2 4 29 58 116 241 263 482 526 841 964 1052 1682 3364 6989 7627 13978 15254 27956 30508 63383 126766 202681 221183 253532 405362 442366 810724 884732 1838107 3676214 7352428 53305103 106610206 213220412