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122213231 = 727763029
BaseRepresentation
bin1110100100011…
…01001101101111
322111222002000222
413102031031233
5222241310411
620043241555
73012536540
oct722151557
9274862028
10122213231
1162a93678
1234b192bb
131c42042a
14123344c7
15aae14db
hex748d36f

122213231 has 8 divisors (see below), whose sum is σ = 140178720. Its totient is φ = 104374368.

The previous prime is 122213213. The next prime is 122213261. The reversal of 122213231 is 132312221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122213231 - 226 = 55104367 is a prime.

It is a super-2 number, since 2×1222132312 = 29872147662918722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122213261) 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, 29576 + ... + 33453.

It is an arithmetic number, because the mean of its divisors is an integer number (17522340).

Almost surely, 2122213231 is an apocalyptic number.

122213231 is a deficient number, since it is larger than the sum of its proper divisors (17965489).

122213231 is an equidigital number, since it uses as much as digits as its factorization.

122213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63313.

The product of its digits is 144, while the sum is 17.

The square root of 122213231 is about 11055.0093170472. The cubic root of 122213231 is about 496.2563480969.

Adding to 122213231 its reverse (132312221), we get a palindrome (254525452).

The spelling of 122213231 in words is "one hundred twenty-two million, two hundred thirteen thousand, two hundred thirty-one".

Divisors: 1 7 277 1939 63029 441203 17459033 122213231