145222613 has 4 divisors (see below), whose sum is σ = 146267520. Its totient is φ = 144177708.

The previous prime is 145222577. The next prime is 145222661. The reversal of 145222613 is 316222541.

It is a happy number.

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 not a de Polignac number, because 145222613 - 2⁶ = 145222549 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 (145222663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522245 + ... + 522522.

It is an arithmetic number, because the mean of its divisors is an integer number (36566880).

Almost surely, 2^145222613 is an apocalyptic number.

It is an amenable number.

145222613 is a deficient number, since it is larger than the sum of its proper divisors (1044907).

145222613 is a wasteful number, since it uses less digits than its factorization.

145222613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044906.

The product of its digits is 2880, while the sum is 26.

The square root of 145222613 is about 12050.8345354170. The cubic root of 145222613 is about 525.6275042521.

The spelling of 145222613 in words is "one hundred forty-five million, two hundred twenty-two thousand, six hundred thirteen".