70248281 has 4 divisors (see below), whose sum is σ = 70267392. Its totient is φ = 70229172.

The previous prime is 70248253. The next prime is 70248287. The reversal of 70248281 is 18284207.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18284207 = 2087 ⋅8761.

It is a cyclic number.

It is not a de Polignac number, because 70248281 - 2¹⁰ = 70247257 is a prime.

It is a super-2 number, since 2×70248281² = 9869641966909922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70248287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2105 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (17566848).

Almost surely, 2^70248281 is an apocalyptic number.

It is an amenable number.

70248281 is a deficient number, since it is larger than the sum of its proper divisors (19111).

70248281 is a wasteful number, since it uses less digits than its factorization.

70248281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19110.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 70248281 is about 8381.4247595501. The cubic root of 70248281 is about 412.6152106716.

The spelling of 70248281 in words is "seventy million, two hundred forty-eight thousand, two hundred eighty-one".