64101231 has 24 divisors (see below), whose sum is σ = 97783920. Its totient is φ = 40352256.

The previous prime is 64101229. The next prime is 64101259. The reversal of 64101231 is 13210146.

It is a happy number.

64101231 is a `hidden beast` number, since 641 + 0 + 1 + 23 + 1 = 666.

It is not a de Polignac number, because 64101231 - 2¹ = 64101229 is a prime.

It is a super-2 number, since 2×64101231² = 8217935631430722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64101431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94911 + ... + 95583.

It is an arithmetic number, because the mean of its divisors is an integer number (4074330).

Almost surely, 2^64101231 is an apocalyptic number.

64101231 is a deficient number, since it is larger than the sum of its proper divisors (33682689).

64101231 is a wasteful number, since it uses less digits than its factorization.

64101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1252 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 64101231 is about 8006.3244375931. The cubic root of 64101231 is about 400.2107868194.

Adding to 64101231 its reverse (13210146), we get a palindrome (77311377).

The spelling of 64101231 in words is "sixty-four million, one hundred one thousand, two hundred thirty-one".