81037153 has 2 divisors, whose sum is σ = 81037154. Its totient is φ = 81037152.

The previous prime is 81037091. The next prime is 81037169. The reversal of 81037153 is 35173018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80784144 + 253009 = 8988^2 + 503^2 .

It is a cyclic number.

It is not a de Polignac number, because 81037153 - 2¹⁷ = 80906081 is a prime.

It is not a weakly prime, because it can be changed into another prime (81037183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40518576 + 40518577.

It is an arithmetic number, because the mean of its divisors is an integer number (40518577).

Almost surely, 2^81037153 is an apocalyptic number.

It is an amenable number.

81037153 is a deficient number, since it is larger than the sum of its proper divisors (1).

81037153 is an equidigital number, since it uses as much as digits as its factorization.

81037153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 81037153 is about 9002.0638189251. The cubic root of 81037153 is about 432.7410139413.

The spelling of 81037153 in words is "eighty-one million, thirty-seven thousand, one hundred fifty-three".