145231240212 has 36 divisors (see below), whose sum is σ = 372141244020. Its totient is φ = 47747256192.

The previous prime is 145231240207. The next prime is 145231240247. The reversal of 145231240212 is 212042132541.

145231240212 is a `hidden beast` number, since 1 + 4 + 523 + 124 + 0 + 2 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 105517127556 + 39714112656 = 324834^2 + 199284^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×145231240212² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27628887 + ... + 27634142.

Almost surely, 2^145231240212 is an apocalyptic number.

145231240212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145231240212 is an abundant number, since it is smaller than the sum of its proper divisors (226910003808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145231240212 is a wasteful number, since it uses less digits than its factorization.

145231240212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55263112 (or 55263107 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 145231240212 its reverse (212042132541), we get a palindrome (357273372753).

The spelling of 145231240212 in words is "one hundred forty-five billion, two hundred thirty-one million, two hundred forty thousand, two hundred twelve".