2009157725 has 12 divisors (see below), whose sum is σ = 2514642624. Its totient is φ = 1592302320.

The previous prime is 2009157719. The next prime is 2009157737. The reversal of 2009157725 is 5277519002.

It is not a de Polignac number, because 2009157725 - 2²⁰ = 2008109149 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 372869 + ... + 378218.

It is an arithmetic number, because the mean of its divisors is an integer number (209553552).

Almost surely, 2^2009157725 is an apocalyptic number.

2009157725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2009157725 is a deficient number, since it is larger than the sum of its proper divisors (505484899).

2009157725 is a wasteful number, since it uses less digits than its factorization.

2009157725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751204 (or 751199 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 2009157725 is about 44823.6290922545. The cubic root of 2009157725 is about 1261.8411240343.

The spelling of 2009157725 in words is "two billion, nine million, one hundred fifty-seven thousand, seven hundred twenty-five".