Search a number
-
+
2991213 = 321632039
BaseRepresentation
bin1011011010010001101101
312121222011200
423122101231
51231204323
6144040113
734265511
oct13322155
95558150
102991213
111763385
121003039
13809664
1457c141
153e1443
hex2da46d

2991213 has 12 divisors (see below), whose sum is σ = 4349280. Its totient is φ = 1980936.

The previous prime is 2991203. The next prime is 2991217. The reversal of 2991213 is 3121992.

It is not a de Polignac number, because 2991213 - 28 = 2990957 is a prime.

It is a super-2 number, since 2×29912132 = 17894710422738, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

2991213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991217) 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, 448 + ... + 2486.

It is an arithmetic number, because the mean of its divisors is an integer number (362440).

22991213 is an apocalyptic number.

It is an amenable number.

2991213 is a deficient number, since it is larger than the sum of its proper divisors (1358067).

2991213 is a wasteful number, since it uses less digits than its factorization.

2991213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208 (or 2205 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 2991213 is about 1729.5123590192. The cubic root of 2991213 is about 144.0840076945.

The spelling of 2991213 in words is "two million, nine hundred ninety-one thousand, two hundred thirteen".

Divisors: 1 3 9 163 489 1467 2039 6117 18351 332357 997071 2991213