151851986 has 32 divisors (see below), whose sum is σ = 270865728. Its totient is φ = 62936640.

The previous prime is 151851979. The next prime is 151851989. The reversal of 151851986 is 689158151.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (151851989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20540 + ... + 26936.

It is an arithmetic number, because the mean of its divisors is an integer number (8464554).

Almost surely, 2^151851986 is an apocalyptic number.

151851986 is a deficient number, since it is larger than the sum of its proper divisors (119013742).

151851986 is a wasteful number, since it uses less digits than its factorization.

151851986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506.

The product of its digits is 86400, while the sum is 44.

The square root of 151851986 is about 12322.8237835327. The cubic root of 151851986 is about 533.5070450636.

It can be divided in two parts, 15185 and 1986, that added together give a palindrome (17171).

The spelling of 151851986 in words is "one hundred fifty-one million, eight hundred fifty-one thousand, nine hundred eighty-six".