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23131032190 = 257330443317
BaseRepresentation
bin10101100010101101…
…111000101001111110
32012201001010011221221
4111202231320221332
5334333021012230
614343134143554
71446131346430
oct254255705176
965631104857
1023131032190
11989a956932
124596651bba
1322482796c6
14119607a650
15905a9427a
hex562b78a7e

23131032190 has 16 divisors (see below), whose sum is σ = 47583837792. Its totient is φ = 7930639584.

The previous prime is 23131032181. The next prime is 23131032191. The reversal of 23131032190 is 9123013132.

It is a super-2 number, since 2×231310321902 (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131032191) 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, 165221589 + ... + 165221728.

It is an arithmetic number, because the mean of its divisors is an integer number (2973989862).

Almost surely, 223131032190 is an apocalyptic number.

23131032190 is an abundant number, since it is smaller than the sum of its proper divisors (24452805602).

23131032190 is a wasteful number, since it uses less digits than its factorization.

23131032190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330443331.

The product of its (nonzero) digits is 972, while the sum is 25.

The spelling of 23131032190 in words is "twenty-three billion, one hundred thirty-one million, thirty-two thousand, one hundred ninety".

Divisors: 1 2 5 7 10 14 35 70 330443317 660886634 1652216585 2313103219 3304433170 4626206438 11565516095 23131032190