145231522120 has 16 divisors (see below), whose sum is σ = 326770924860. Its totient is φ = 58092608832.

The previous prime is 145231522103. The next prime is 145231522129. The reversal of 145231522120 is 21225132541.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 144733071844 + 498450276 = 380438^2 + 22326^2 .

It is not an unprimeable number, because it can be changed into a prime (145231522129) 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, 1815393987 + ... + 1815394066.

Almost surely, 2^145231522120 is an apocalyptic number.

145231522120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145231522120 is an abundant number, since it is smaller than the sum of its proper divisors (181539402740).

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

145231522120 is a wasteful number, since it uses less digits than its factorization.

145231522120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3630788064 (or 3630788060 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 145231522120 its reverse (21225132541), we get a palindrome (166456654661).

The spelling of 145231522120 in words is "one hundred forty-five billion, two hundred thirty-one million, five hundred twenty-two thousand, one hundred twenty".