285215521075 has 12 divisors (see below), whose sum is σ = 353723855760. Its totient is φ = 228135894560.

The previous prime is 285215521069. The next prime is 285215521103. The reversal of 285215521075 is 570125512582.

It is not a de Polignac number, because 285215521075 - 2¹⁷ = 285215390003 is a prime.

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, 753199 + ... + 1066648.

It is an arithmetic number, because the mean of its divisors is an integer number (29476987980).

Almost surely, 2^285215521075 is an apocalyptic number.

285215521075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

285215521075 is a deficient number, since it is larger than the sum of its proper divisors (68508334685).

285215521075 is a wasteful number, since it uses less digits than its factorization.

285215521075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826126 (or 1826121 counting only the distinct ones).

The product of its (nonzero) digits is 280000, while the sum is 43.

The spelling of 285215521075 in words is "two hundred eighty-five billion, two hundred fifteen million, five hundred twenty-one thousand, seventy-five".