1530216725 has 12 divisors (see below), whose sum is σ = 1898021376. Its totient is φ = 1223816880.

The previous prime is 1530216713. The next prime is 1530216757. The reversal of 1530216725 is 5276120351.

It is not a de Polignac number, because 1530216725 - 2²⁶ = 1463107861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1530216691 and 1530216700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109484 + ... + 122666.

It is an arithmetic number, because the mean of its divisors is an integer number (158168448).

Almost surely, 2^1530216725 is an apocalyptic number.

It is an amenable number.

1530216725 is a deficient number, since it is larger than the sum of its proper divisors (367804651).

1530216725 is a wasteful number, since it uses less digits than its factorization.

1530216725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17836 (or 17831 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 1530216725 is about 39117.9846745714. The cubic root of 1530216725 is about 1152.3497576134.

The spelling of 1530216725 in words is "one billion, five hundred thirty million, two hundred sixteen thousand, seven hundred twenty-five".