70113281 has 8 divisors (see below), whose sum is σ = 81258624. Its totient is φ = 59250240.

The previous prime is 70113257. The next prime is 70113283. The reversal of 70113281 is 18231107.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-70113281 is a prime.

It is a super-2 number, since 2×70113281² = 9831744345169922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70113283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70040 + ... + 71033.

It is an arithmetic number, because the mean of its divisors is an integer number (10157328).

Almost surely, 2^70113281 is an apocalyptic number.

70113281 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

70113281 is a deficient number, since it is larger than the sum of its proper divisors (11145343).

70113281 is a wasteful number, since it uses less digits than its factorization.

70113281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141151.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 70113281 is about 8373.3673632536. The cubic root of 70113281 is about 412.3507260307.

Adding to 70113281 its reverse (18231107), we get a palindrome (88344388).

The spelling of 70113281 in words is "seventy million, one hundred thirteen thousand, two hundred eighty-one".