70100881 has 4 divisors (see below), whose sum is σ = 70464292. Its totient is φ = 69737472.

The previous prime is 70100813. The next prime is 70100929. The reversal of 70100881 is 18800107.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9120400 + 60980481 = 3020^2 + 7809^2 .

It is a cyclic number.

It is not a de Polignac number, because 70100881 - 2⁷ = 70100753 is a prime.

It is a super-2 number, since 2×70100881² = 9828267033952322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70100081) 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 in 3 ways as a sum of consecutive naturals, for example, 181416 + ... + 181801.

It is an arithmetic number, because the mean of its divisors is an integer number (17616073).

Almost surely, 2^70100881 is an apocalyptic number.

It is an amenable number.

70100881 is a deficient number, since it is larger than the sum of its proper divisors (363411).

70100881 is a wasteful number, since it uses less digits than its factorization.

70100881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363410.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 70100881 is about 8372.6268876620. The cubic root of 70100881 is about 412.3264156081.

Adding to 70100881 its reverse (18800107), we get a palindrome (88900988).

The spelling of 70100881 in words is "seventy million, one hundred thousand, eight hundred eighty-one".