151031 has 4 divisors (see below), whose sum is σ = 159000. Its totient is φ = 143064.

The previous prime is 151027. The next prime is 151049. The reversal of 151031 is 130151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130151 = 7 ⋅18593.

It is a cyclic number.

It is not a de Polignac number, because 151031 - 2² = 151027 is a prime.

It is a super-2 number, since 2×151031² = 45620725922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151051) 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, 3956 + ... + 3993.

It is an arithmetic number, because the mean of its divisors is an integer number (39750).

2¹⁵¹⁰³¹ is an apocalyptic number.

151031 is a deficient number, since it is larger than the sum of its proper divisors (7969).

151031 is an equidigital number, since it uses as much as digits as its factorization.

151031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7968.

The product of its (nonzero) digits is 15, while the sum is 11.

The square root of 151031 is about 388.6270705960. The cubic root of 151031 is about 53.2543840572.

Adding to 151031 its reverse (130151), we get a palindrome (281182).

The spelling of 151031 in words is "one hundred fifty-one thousand, thirty-one".