1501530281 has 2 divisors, whose sum is σ = 1501530282. Its totient is φ = 1501530280.

The previous prime is 1501530241. The next prime is 1501530313. The reversal of 1501530281 is 1820351051.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1360134400 + 141395881 = 36880^2 + 11891^2 .

It is an emirp because it is prime and its reverse (1820351051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1501530281 - 2¹⁸ = 1501268137 is a prime.

It is a super-2 number, since 2×1501530281² = 4509186369519877922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1501530281.

It is not a weakly prime, because it can be changed into another prime (1501530241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750765140 + 750765141.

It is an arithmetic number, because the mean of its divisors is an integer number (750765141).

Almost surely, 2^1501530281 is an apocalyptic number.

It is an amenable number.

1501530281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501530281 is an equidigital number, since it uses as much as digits as its factorization.

1501530281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1501530281 is about 38749.5842687376. The cubic root of 1501530281 is about 1145.1033845742.

The spelling of 1501530281 in words is "one billion, five hundred one million, five hundred thirty thousand, two hundred eighty-one".