145724227 has 4 divisors (see below), whose sum is σ = 158971896. Its totient is φ = 132476560.

The previous prime is 145724219. The next prime is 145724231. The reversal of 145724227 is 722427541.

145724227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145724227 - 2³ = 145724219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145724192 and 145724201.

It is not an unprimeable number, because it can be changed into a prime (145724237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6623818 + ... + 6623839.

It is an arithmetic number, because the mean of its divisors is an integer number (39742974).

Almost surely, 2^145724227 is an apocalyptic number.

145724227 is a deficient number, since it is larger than the sum of its proper divisors (13247669).

145724227 is a wasteful number, since it uses less digits than its factorization.

145724227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13247668.

The product of its digits is 31360, while the sum is 34.

The square root of 145724227 is about 12071.6290118608. The cubic root of 145724227 is about 526.2319994670.

The spelling of 145724227 in words is "one hundred forty-five million, seven hundred twenty-four thousand, two hundred twenty-seven".