151551 has 10 divisors (see below), whose sum is σ = 226512. Its totient is φ = 100980.

The previous prime is 151549. The next prime is 151553. The reversal of 151551 is 155151.

It is an interprime number because it is at equal distance from previous prime (151549) and next prime (151553).

It is not a de Polignac number, because 151551 - 2¹ = 151549 is a prime.

151551 is a lucky number.

It is a plaindrome in base 8 and base 16.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151553) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 855 + ... + 1016.

2¹⁵¹⁵⁵¹ is an apocalyptic number.

151551 is a deficient number, since it is larger than the sum of its proper divisors (74961).

151551 is an equidigital number, since it uses as much as digits as its factorization.

151551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883 (or 1874 counting only the distinct ones).

The product of its digits is 125, while the sum is 18.

The square root of 151551 is about 389.2955175699. The cubic root of 151551 is about 53.3154323604.

Subtracting 151551 from its reverse (155151), we obtain a square (3600 = 60²).

The spelling of 151551 in words is "one hundred fifty-one thousand, five hundred fifty-one".