145054221 has 12 divisors (see below), whose sum is σ = 209428128. Its totient is φ = 89263824.

The previous prime is 145054219. The next prime is 145054237. The reversal of 145054221 is 122450541.

It is not a de Polignac number, because 145054221 - 2¹ = 145054219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 145054191 and 145054200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145054211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142545 + ... + 143558.

It is an arithmetic number, because the mean of its divisors is an integer number (17452344).

Almost surely, 2^145054221 is an apocalyptic number.

It is an amenable number.

145054221 is a deficient number, since it is larger than the sum of its proper divisors (64373907).

145054221 is a wasteful number, since it uses less digits than its factorization.

145054221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286132 (or 286119 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 145054221 is about 12043.8457728418. The cubic root of 145054221 is about 525.4242629480.

The spelling of 145054221 in words is "one hundred forty-five million, fifty-four thousand, two hundred twenty-one".