151231001 has 4 divisors (see below), whose sum is σ = 154919604. Its totient is φ = 147542400.

The previous prime is 151230979. The next prime is 151231021. The reversal of 151231001 is 100132151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73085401 + 78145600 = 8549^2 + 8840^2 .

It is a cyclic number.

It is not a de Polignac number, because 151231001 - 2²² = 147036697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151231021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1844240 + ... + 1844321.

It is an arithmetic number, because the mean of its divisors is an integer number (38729901).

Almost surely, 2^151231001 is an apocalyptic number.

It is an amenable number.

151231001 is a deficient number, since it is larger than the sum of its proper divisors (3688603).

151231001 is an equidigital number, since it uses as much as digits as its factorization.

151231001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3688602.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 151231001 is about 12297.6014327998. The cubic root of 151231001 is about 532.7788084939.

Adding to 151231001 its reverse (100132151), we get a palindrome (251363152).

The spelling of 151231001 in words is "one hundred fifty-one million, two hundred thirty-one thousand, one".