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28233131 is a prime number
BaseRepresentation
bin110101110110…
…0110110101011
31222010101120112
41223230312223
524211430011
62445044535
7461656223
oct153546653
958111515
1028233131
1114a33a73
12955674b
135b069c4
143a6d083
15272a58b
hex1aecdab

28233131 has 2 divisors, whose sum is σ = 28233132. Its totient is φ = 28233130.

The previous prime is 28233119. The next prime is 28233143. The reversal of 28233131 is 13133282.

It is a balanced prime because it is at equal distance from previous prime (28233119) and next prime (28233143).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-28233131 is a prime.

It is a super-2 number, since 2×282331312 = 1594219372126322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28233097 and 28233106.

It is not a weakly prime, because it can be changed into another prime (28233631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14116565 + 14116566.

It is an arithmetic number, because the mean of its divisors is an integer number (14116566).

Almost surely, 228233131 is an apocalyptic number.

28233131 is a deficient number, since it is larger than the sum of its proper divisors (1).

28233131 is an equidigital number, since it uses as much as digits as its factorization.

28233131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 28233131 is about 5313.4857673659. The cubic root of 28233131 is about 304.4993344661.

The spelling of 28233131 in words is "twenty-eight million, two hundred thirty-three thousand, one hundred thirty-one".