145215422452 has 24 divisors (see below), whose sum is σ = 260894982600. Its totient is φ = 70681751040.

The previous prime is 145215422447. The next prime is 145215422479. The reversal of 145215422452 is 254224512541.

It can be written as a sum of positive squares in 4 ways, for example, as 31352368356 + 113863054096 = 177066^2 + 337436^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893827 + ... + 1043722.

It is an arithmetic number, because the mean of its divisors is an integer number (10870624275).

Almost surely, 2^145215422452 is an apocalyptic number.

It is an amenable number.

145215422452 is a deficient number, since it is larger than the sum of its proper divisors (115679560148).

145215422452 is a wasteful number, since it uses less digits than its factorization.

145215422452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938051 (or 1938049 counting only the distinct ones).

The product of its digits is 128000, while the sum is 37.

Adding to 145215422452 its reverse (254224512541), we get a palindrome (399439934993).

The spelling of 145215422452 in words is "one hundred forty-five billion, two hundred fifteen million, four hundred twenty-two thousand, four hundred fifty-two".