151240321 has 2 divisors, whose sum is σ = 151240322. Its totient is φ = 151240320.

The previous prime is 151240319. The next prime is 151240357. The reversal of 151240321 is 123042151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133726096 + 17514225 = 11564^2 + 4185^2 .

It is an emirp because it is prime and its reverse (123042151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151240321 - 2¹ = 151240319 is a prime.

Together with 151240319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (151240391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75620160 + 75620161.

It is an arithmetic number, because the mean of its divisors is an integer number (75620161).

Almost surely, 2^151240321 is an apocalyptic number.

It is an amenable number.

151240321 is a deficient number, since it is larger than the sum of its proper divisors (1).

151240321 is an equidigital number, since it uses as much as digits as its factorization.

151240321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 151240321 is about 12297.9803626449. The cubic root of 151240321 is about 532.7897528912.

Adding to 151240321 its reverse (123042151), we get a palindrome (274282472).

The spelling of 151240321 in words is "one hundred fifty-one million, two hundred forty thousand, three hundred twenty-one".