145205521403 has 16 divisors (see below), whose sum is σ = 157595336640. Its totient is φ = 133247462400.

The previous prime is 145205521399. The next prime is 145205521451. The reversal of 145205521403 is 304125502541.

It is a cyclic number.

It is not a de Polignac number, because 145205521403 - 2² = 145205521399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145205521403.

It is not an unprimeable number, because it can be changed into a prime (145205521103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1065578 + ... + 1194096.

It is an arithmetic number, because the mean of its divisors is an integer number (9849708540).

Almost surely, 2^145205521403 is an apocalyptic number.

145205521403 is a deficient number, since it is larger than the sum of its proper divisors (12389815237).

145205521403 is a wasteful number, since it uses less digits than its factorization.

145205521403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130198.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 145205521403 in words is "one hundred forty-five billion, two hundred five million, five hundred twenty-one thousand, four hundred three".