145210021505 has 8 divisors (see below), whose sum is σ = 174269495400. Its totient is φ = 116156370816.

The previous prime is 145210021469. The next prime is 145210021511. The reversal of 145210021505 is 505120012541.

It can be written as a sum of positive squares in 4 ways, for example, as 22754817409 + 122455204096 = 150847^2 + 349936^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145210021505 - 2¹⁰ = 145210020481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1400750 + ... + 1500839.

It is an arithmetic number, because the mean of its divisors is an integer number (21783686925).

Almost surely, 2^145210021505 is an apocalyptic number.

It is an amenable number.

145210021505 is a deficient number, since it is larger than the sum of its proper divisors (29059473895).

145210021505 is a wasteful number, since it uses less digits than its factorization.

145210021505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911603.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 145210021505 in words is "one hundred forty-five billion, two hundred ten million, twenty-one thousand, five hundred five".