153542681 has 2 divisors, whose sum is σ = 153542682. Its totient is φ = 153542680.

The previous prime is 153542651. The next prime is 153542693. The reversal of 153542681 is 186245351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82646281 + 70896400 = 9091^2 + 8420^2 .

It is a cyclic number.

It is not a de Polignac number, because 153542681 - 2¹⁸ = 153280537 is a prime.

It is a super-2 number, since 2×153542681² = 47150709777335522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (153542621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76771340 + 76771341.

It is an arithmetic number, because the mean of its divisors is an integer number (76771341).

Almost surely, 2^153542681 is an apocalyptic number.

It is an amenable number.

153542681 is a deficient number, since it is larger than the sum of its proper divisors (1).

153542681 is an equidigital number, since it uses as much as digits as its factorization.

153542681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 35.

The square root of 153542681 is about 12391.2340386259. The cubic root of 153542681 is about 535.4797350635.

The spelling of 153542681 in words is "one hundred fifty-three million, five hundred forty-two thousand, six hundred eighty-one".