145215321503 has 16 divisors (see below), whose sum is σ = 170461730304. Its totient is φ = 121094883360.

The previous prime is 145215321473. The next prime is 145215321547. The reversal of 145215321503 is 305123512541.

It is a cyclic number.

It is not a de Polignac number, because 145215321503 - 2⁶ = 145215321439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145215321503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145215323503) 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, 3852518 + ... + 3890028.

It is an arithmetic number, because the mean of its divisors is an integer number (10653858144).

Almost surely, 2^145215321503 is an apocalyptic number.

145215321503 is a deficient number, since it is larger than the sum of its proper divisors (25246408801).

145215321503 is a wasteful number, since it uses less digits than its factorization.

145215321503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52502.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 145215321503 in words is "one hundred forty-five billion, two hundred fifteen million, three hundred twenty-one thousand, five hundred three".