85970251 has 4 divisors (see below), whose sum is σ = 89708112. Its totient is φ = 82232392.

The previous prime is 85970233. The next prime is 85970267. The reversal of 85970251 is 15207958.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85970251 - 2¹³ = 85962059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85970251.

It is not an unprimeable number, because it can be changed into a prime (85970221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1868896 + ... + 1868941.

It is an arithmetic number, because the mean of its divisors is an integer number (22427028).

Almost surely, 2^85970251 is an apocalyptic number.

85970251 is a deficient number, since it is larger than the sum of its proper divisors (3737861).

85970251 is a wasteful number, since it uses less digits than its factorization.

85970251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737860.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 85970251 is about 9272.0143981769. The cubic root of 85970251 is about 441.3495941598.

The spelling of 85970251 in words is "eighty-five million, nine hundred seventy thousand, two hundred fifty-one".