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164531023 = 352746649
BaseRepresentation
bin10011100111010…
…00101101001111
3102110121001010121
421303220231033
5314104443043
624154245411
74035330166
oct1163505517
9373531117
10164531023
1184967658
1247126867
1328118c47
1417bcc3dd
15e69eded
hex9ce8b4f

164531023 has 4 divisors (see below), whose sum is σ = 164581200. Its totient is φ = 164480848.

The previous prime is 164531021. The next prime is 164531041. The reversal of 164531023 is 320135461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320135461 = 3131022797.

It is a cyclic number.

It is not a de Polignac number, because 164531023 - 21 = 164531021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164531021) 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, 19798 + ... + 26851.

It is an arithmetic number, because the mean of its divisors is an integer number (41145300).

Almost surely, 2164531023 is an apocalyptic number.

164531023 is a deficient number, since it is larger than the sum of its proper divisors (50177).

164531023 is an equidigital number, since it uses as much as digits as its factorization.

164531023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50176.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 164531023 is about 12826.9646838213. The cubic root of 164531023 is about 547.9605160516.

Adding to 164531023 its reverse (320135461), we get a palindrome (484666484).

The spelling of 164531023 in words is "one hundred sixty-four million, five hundred thirty-one thousand, twenty-three".

Divisors: 1 3527 46649 164531023