70172851 has 12 divisors (see below), whose sum is σ = 82551960. Its totient is φ = 59468640.

The previous prime is 70172849. The next prime is 70172857. The reversal of 70172851 is 15827107.

It is a happy number.

It is not a de Polignac number, because 70172851 - 2¹ = 70172849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70172857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3685 + ... + 12406.

It is an arithmetic number, because the mean of its divisors is an integer number (6879330).

Almost surely, 2^70172851 is an apocalyptic number.

70172851 is a deficient number, since it is larger than the sum of its proper divisors (12379109).

70172851 is a wasteful number, since it uses less digits than its factorization.

70172851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16194 (or 16187 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 70172851 is about 8376.9237193614. The cubic root of 70172851 is about 412.4674741418.

Adding to 70172851 its reverse (15827107), we get a palindrome (85999958).

The spelling of 70172851 in words is "seventy million, one hundred seventy-two thousand, eight hundred fifty-one".