151137221 has 2 divisors, whose sum is σ = 151137222. Its totient is φ = 151137220.

The previous prime is 151137187. The next prime is 151137227. The reversal of 151137221 is 122731151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134212225 + 16924996 = 11585^2 + 4114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151137221 is a prime.

It is a super-3 number, since 3×151137221³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen 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 (151137227) 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, 75568610 + 75568611.

It is an arithmetic number, because the mean of its divisors is an integer number (75568611).

Almost surely, 2^151137221 is an apocalyptic number.

It is an amenable number.

151137221 is a deficient number, since it is larger than the sum of its proper divisors (1).

151137221 is an equidigital number, since it uses as much as digits as its factorization.

151137221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 23.

The square root of 151137221 is about 12293.7879028394. The cubic root of 151137221 is about 532.6686583976.

Adding to 151137221 its reverse (122731151), we get a palindrome (273868372).

The spelling of 151137221 in words is "one hundred fifty-one million, one hundred thirty-seven thousand, two hundred twenty-one".