145245522013 has 4 divisors (see below), whose sum is σ = 149171076700. Its totient is φ = 141319967328.

The previous prime is 145245522001. The next prime is 145245522049. The reversal of 145245522013 is 310225542541.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 110365477369 + 34880044644 = 332213^2 + 186762^2 .

It is a cyclic number.

It is not a de Polignac number, because 145245522013 - 2³³ = 136655587421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145245522013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145245502013) 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, 1962777288 + ... + 1962777361.

It is an arithmetic number, because the mean of its divisors is an integer number (37292769175).

Almost surely, 2^145245522013 is an apocalyptic number.

It is an amenable number.

145245522013 is a deficient number, since it is larger than the sum of its proper divisors (3925554687).

145245522013 is an equidigital number, since it uses as much as digits as its factorization.

145245522013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3925554686.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 145245522013 in words is "one hundred forty-five billion, two hundred forty-five million, five hundred twenty-two thousand, thirteen".