145225552 has 40 divisors (see below), whose sum is σ = 285785280. Its totient is φ = 71485440.

The previous prime is 145225547. The next prime is 145225573. The reversal of 145225552 is 255522541.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404349 + ... + 404707.

It is an arithmetic number, because the mean of its divisors is an integer number (7144632).

Almost surely, 2^145225552 is an apocalyptic number.

It is an amenable number.

145225552 is a deficient number, since it is larger than the sum of its proper divisors (140559728).

145225552 is a wasteful number, since it uses less digits than its factorization.

145225552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 685 counting only the distinct ones).

The product of its digits is 20000, while the sum is 31.

The square root of 145225552 is about 12050.9564765623. The cubic root of 145225552 is about 525.6310500929.

The spelling of 145225552 in words is "one hundred forty-five million, two hundred twenty-five thousand, five hundred fifty-two".