145400222120 has 16 divisors (see below), whose sum is σ = 327150499860. Its totient is φ = 58160088832.

The previous prime is 145400222117. The next prime is 145400222137. The reversal of 145400222120 is 21222004541.

It can be written as a sum of positive squares in 2 ways, for example, as 145171668196 + 228553924 = 381014^2 + 15118^2 .

It is a super-2 number, since 2×145400222120² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1817502737 + ... + 1817502816.

Almost surely, 2^145400222120 is an apocalyptic number.

145400222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145400222120 is an abundant number, since it is smaller than the sum of its proper divisors (181750277740).

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

145400222120 is a wasteful number, since it uses less digits than its factorization.

145400222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635005564 (or 3635005560 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 145400222120 its reverse (21222004541), we get a palindrome (166622226661).

The spelling of 145400222120 in words is "one hundred forty-five billion, four hundred million, two hundred twenty-two thousand, one hundred twenty".