151811 has 8 divisors (see below), whose sum is σ = 170544. Its totient is φ = 133920.

The previous prime is 151799. The next prime is 151813. The reversal of 151811 is 118151.

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 151811 - 2¹⁴ = 135427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 151811.

It is not an unprimeable number, because it can be changed into a prime (151813) 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, 221 + ... + 593.

It is an arithmetic number, because the mean of its divisors is an integer number (21318).

2¹⁵¹⁸¹¹ is an apocalyptic number.

151811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

151811 is a deficient number, since it is larger than the sum of its proper divisors (18733).

151811 is a wasteful number, since it uses less digits than its factorization.

151811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421.

The product of its digits is 40, while the sum is 17.

The square root of 151811 is about 389.6293110124. The cubic root of 151811 is about 53.3459041548.

Adding to 151811 its reverse (118151), we get a palindrome (269962).

The spelling of 151811 in words is "one hundred fifty-one thousand, eight hundred eleven".