151115021 has 2 divisors, whose sum is σ = 151115022. Its totient is φ = 151115020.

The previous prime is 151115009. The next prime is 151115033. The reversal of 151115021 is 120511151.

It is a balanced prime because it is at equal distance from previous prime (151115009) and next prime (151115033).

It can be written as a sum of positive squares in only one way, i.e., 126810121 + 24304900 = 11261^2 + 4930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151115021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151115821) 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 as a sum of consecutive naturals, namely, 75557510 + 75557511.

It is an arithmetic number, because the mean of its divisors is an integer number (75557511).

Almost surely, 2^151115021 is an apocalyptic number.

It is an amenable number.

151115021 is a deficient number, since it is larger than the sum of its proper divisors (1).

151115021 is an equidigital number, since it uses as much as digits as its factorization.

151115021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50, while the sum is 17.

The square root of 151115021 is about 12292.8849746510. The cubic root of 151115021 is about 532.6425765294.

Adding to 151115021 its reverse (120511151), we get a palindrome (271626172).

The spelling of 151115021 in words is "one hundred fifty-one million, one hundred fifteen thousand, twenty-one".