151720441 has 2 divisors, whose sum is σ = 151720442. Its totient is φ = 151720440.

The previous prime is 151720409. The next prime is 151720501. The reversal of 151720441 is 144027151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77070841 + 74649600 = 8779^2 + 8640^2 .

It is an emirp because it is prime and its reverse (144027151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151720441 - 2⁵ = 151720409 is a prime.

It is not a weakly prime, because it can be changed into another prime (151720741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75860220 + 75860221.

It is an arithmetic number, because the mean of its divisors is an integer number (75860221).

Almost surely, 2^151720441 is an apocalyptic number.

It is an amenable number.

151720441 is a deficient number, since it is larger than the sum of its proper divisors (1).

151720441 is an equidigital number, since it uses as much as digits as its factorization.

151720441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 151720441 is about 12317.4851735247. The cubic root of 151720441 is about 533.3529466311.

Adding to 151720441 its reverse (144027151), we get a palindrome (295747592).

The spelling of 151720441 in words is "one hundred fifty-one million, seven hundred twenty thousand, four hundred forty-one".