145221502 has 16 divisors (see below), whose sum is σ = 226540800. Its totient is φ = 69734560.

The previous prime is 145221481. The next prime is 145221547. The reversal of 145221502 is 205122541.

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, 4524 + ... + 17632.

It is an arithmetic number, because the mean of its divisors is an integer number (14158800).

Almost surely, 2^145221502 is an apocalyptic number.

145221502 is a deficient number, since it is larger than the sum of its proper divisors (81319298).

145221502 is a wasteful number, since it uses less digits than its factorization.

145221502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13331.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 145221502 is about 12050.7884389363. The cubic root of 145221502 is about 525.6261638418.

The spelling of 145221502 in words is "one hundred forty-five million, two hundred twenty-one thousand, five hundred two".