203139728285 has 8 divisors (see below), whose sum is σ = 262519033560. Its totient is φ = 150010876224.

The previous prime is 203139728263. The next prime is 203139728357. The reversal of 203139728285 is 582827931302.

It can be written as a sum of positive squares in 4 ways, for example, as 3829849 + 203135898436 = 1957^2 + 450706^2 .

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 203139728285 - 2³⁴ = 185959859101 is a prime.

It is a congruent number.

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, 1562613230 + ... + 1562613359.

It is an arithmetic number, because the mean of its divisors is an integer number (32814879195).

Almost surely, 2^203139728285 is an apocalyptic number.

It is an amenable number.

203139728285 is a deficient number, since it is larger than the sum of its proper divisors (59379305275).

203139728285 is a wasteful number, since it uses less digits than its factorization.

203139728285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125226607.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 203139728285 in words is "two hundred three billion, one hundred thirty-nine million, seven hundred twenty-eight thousand, two hundred eighty-five".