85138015 has 8 divisors (see below), whose sum is σ = 102230640. Its totient is φ = 68067072.

The previous prime is 85138013. The next prime is 85138021. The reversal of 85138015 is 51083158.

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 85138015 - 2¹ = 85138013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85138013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5071 + ... + 13999.

It is an arithmetic number, because the mean of its divisors is an integer number (12778830).

Almost surely, 2^85138015 is an apocalyptic number.

85138015 is a deficient number, since it is larger than the sum of its proper divisors (17092625).

85138015 is a wasteful number, since it uses less digits than its factorization.

85138015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10841.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 85138015 is about 9227.0263357162. The cubic root of 85138015 is about 439.9208104731.

The spelling of 85138015 in words is "eighty-five million, one hundred thirty-eight thousand, fifteen".