70555081 has 2 divisors, whose sum is σ = 70555082. Its totient is φ = 70555080.

The previous prime is 70555073. The next prime is 70555097. The reversal of 70555081 is 18055507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56115081 + 14440000 = 7491^2 + 3800^2 .

It is an emirp because it is prime and its reverse (18055507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70555081 - 2³ = 70555073 is a prime.

It is a super-2 number, since 2×70555081² = 9956038909833122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70555061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35277540 + 35277541.

It is an arithmetic number, because the mean of its divisors is an integer number (35277541).

Almost surely, 2^70555081 is an apocalyptic number.

It is an amenable number.

70555081 is a deficient number, since it is larger than the sum of its proper divisors (1).

70555081 is an equidigital number, since it uses as much as digits as its factorization.

70555081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 70555081 is about 8399.7071972778. The cubic root of 70555081 is about 413.2150189604.

The spelling of 70555081 in words is "seventy million, five hundred fifty-five thousand, eighty-one".