725015174525221 has 4 divisors (see below), whose sum is σ = 725015415567744. Its totient is φ = 725014933482700.

The previous prime is 725015174525219. The next prime is 725015174525233. The reversal of 725015174525221 is 122525471510527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 725015174525221 - 2¹ = 725015174525219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725015174528221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115951765 + ... + 122044426.

It is an arithmetic number, because the mean of its divisors is an integer number (181253853891936).

Almost surely, 2^{725015174525221} is an apocalyptic number.

It is an amenable number.

725015174525221 is a deficient number, since it is larger than the sum of its proper divisors (241042523).

725015174525221 is a wasteful number, since it uses less digits than its factorization.

725015174525221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241042522.

The product of its (nonzero) digits is 1960000, while the sum is 49.

The spelling of 725015174525221 in words is "seven hundred twenty-five trillion, fifteen billion, one hundred seventy-four million, five hundred twenty-five thousand, two hundred twenty-one".