150220781 has 2 divisors, whose sum is σ = 150220782. Its totient is φ = 150220780.

The previous prime is 150220771. The next prime is 150220853. The reversal of 150220781 is 187022051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141015625 + 9205156 = 11875^2 + 3034^2 .

It is a cyclic number.

It is not a de Polignac number, because 150220781 - 2⁶ = 150220717 is a prime.

It is a super-2 number, since 2×150220781² = 45132566088499922, 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 150220781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (150220771) 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, 75110390 + 75110391.

It is an arithmetic number, because the mean of its divisors is an integer number (75110391).

Almost surely, 2^150220781 is an apocalyptic number.

It is an amenable number.

150220781 is a deficient number, since it is larger than the sum of its proper divisors (1).

150220781 is an equidigital number, since it uses as much as digits as its factorization.

150220781 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 26.

The square root of 150220781 is about 12256.4587463100. The cubic root of 150220781 is about 531.5898399333.

The spelling of 150220781 in words is "one hundred fifty million, two hundred twenty thousand, seven hundred eighty-one".