152563781 has 2 divisors, whose sum is σ = 152563782. Its totient is φ = 152563780.

The previous prime is 152563753. The next prime is 152563819. The reversal of 152563781 is 187365251.

It is an a-pointer prime, because the next prime (152563819) can be obtained adding 152563781 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119028100 + 33535681 = 10910^2 + 5791^2 .

It is a cyclic number.

It is not a de Polignac number, because 152563781 - 2⁶ = 152563717 is a prime.

It is a super-2 number, since 2×152563781² = 46551414546031922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152563721) 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, 76281890 + 76281891.

It is an arithmetic number, because the mean of its divisors is an integer number (76281891).

Almost surely, 2^152563781 is an apocalyptic number.

It is an amenable number.

152563781 is a deficient number, since it is larger than the sum of its proper divisors (1).

152563781 is an equidigital number, since it uses as much as digits as its factorization.

152563781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 38.

The square root of 152563781 is about 12351.6711824757. The cubic root of 152563781 is about 534.3393376381.

The spelling of 152563781 in words is "one hundred fifty-two million, five hundred sixty-three thousand, seven hundred eighty-one".