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10123231031 = 25117403043
BaseRepresentation
bin10010110110110010…
…00011111100110111
3222010111122102022122
421123121003330313
5131213021343111
64352303550155
7505602021044
oct113331037467
928114572278
1010123231031
114325333341
121b662bb35b
13c543a5c44
146c06801cb
153e3b00cdb
hex25b643f37

10123231031 has 4 divisors (see below), whose sum is σ = 10123659192. Its totient is φ = 10122802872.

The previous prime is 10123231007. The next prime is 10123231051. The reversal of 10123231031 is 13013232101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13013232101 = 32993944599.

It is a cyclic number.

It is not a de Polignac number, because 10123231031 - 222 = 10119036727 is a prime.

It is a super-2 number, since 2×101232310312 (a number of 21 digits) 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 (10123231051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176405 + ... + 226638.

It is an arithmetic number, because the mean of its divisors is an integer number (2530914798).

Almost surely, 210123231031 is an apocalyptic number.

10123231031 is a deficient number, since it is larger than the sum of its proper divisors (428161).

10123231031 is an equidigital number, since it uses as much as digits as its factorization.

10123231031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428160.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 10123231031 its reverse (13013232101), we get a palindrome (23136463132).

The spelling of 10123231031 in words is "ten billion, one hundred twenty-three million, two hundred thirty-one thousand, thirty-one".

Divisors: 1 25117 403043 10123231031