70216257 has 8 divisors (see below), whose sum is σ = 94749984. Its totient is φ = 46246688.

The previous prime is 70216249. The next prime is 70216339. The reversal of 70216257 is 75261207.

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

It is a cyclic number.

It is not a de Polignac number, because 70216257 - 2³ = 70216249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70216207) 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, 140748 + ... + 141245.

It is an arithmetic number, because the mean of its divisors is an integer number (11843748).

Almost surely, 2^70216257 is an apocalyptic number.

It is an amenable number.

70216257 is a deficient number, since it is larger than the sum of its proper divisors (24533727).

70216257 is a wasteful number, since it uses less digits than its factorization.

70216257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282079.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 70216257 is about 8379.5141267260. The cubic root of 70216257 is about 412.5525016738.

The spelling of 70216257 in words is "seventy million, two hundred sixteen thousand, two hundred fifty-seven".