151851 has 12 divisors (see below), whose sum is σ = 235752. Its totient is φ = 86688.

The previous prime is 151849. The next prime is 151871. The reversal of 151851 is 158151.

It is not a de Polignac number, because 151851 - 2¹ = 151849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370 + ... + 663.

It is an arithmetic number, because the mean of its divisors is an integer number (19646).

2¹⁵¹⁸⁵¹ is an apocalyptic number.

151851 is a deficient number, since it is larger than the sum of its proper divisors (83901).

151851 is a wasteful number, since it uses less digits than its factorization.

151851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050 (or 1043 counting only the distinct ones).

The product of its digits is 200, while the sum is 21.

The square root of 151851 is about 389.6806384721. The cubic root of 151851 is about 53.3505890345.

The spelling of 151851 in words is "one hundred fifty-one thousand, eight hundred fifty-one".