145657229 has 4 divisors (see below), whose sum is σ = 151990176. Its totient is φ = 139324284.

The previous prime is 145657223. The next prime is 145657279. The reversal of 145657229 is 922756541.

145657229 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145657229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145657223) 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, 3166439 + ... + 3166484.

It is an arithmetic number, because the mean of its divisors is an integer number (37997544).

Almost surely, 2^145657229 is an apocalyptic number.

It is an amenable number.

145657229 is a deficient number, since it is larger than the sum of its proper divisors (6332947).

145657229 is an equidigital number, since it uses as much as digits as its factorization.

145657229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332946.

The product of its digits is 151200, while the sum is 41.

The square root of 145657229 is about 12068.8536738167. The cubic root of 145657229 is about 526.1513405019.

It can be divided in two parts, 1456 and 57229, that added together give a palindrome (58685).

The spelling of 145657229 in words is "one hundred forty-five million, six hundred fifty-seven thousand, two hundred twenty-nine".