70043511 has 4 divisors (see below), whose sum is σ = 93391352. Its totient is φ = 46695672.

The previous prime is 70043507. The next prime is 70043513. The reversal of 70043511 is 11534007.

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

It is not a de Polignac number, because 70043511 - 2² = 70043507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70043513) 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, 11673916 + ... + 11673921.

It is an arithmetic number, because the mean of its divisors is an integer number (23347838).

Almost surely, 2^70043511 is an apocalyptic number.

70043511 is a deficient number, since it is larger than the sum of its proper divisors (23347841).

70043511 is a wasteful number, since it uses less digits than its factorization.

70043511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23347840.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 70043511 is about 8369.2001409932. The cubic root of 70043511 is about 412.2139033632.

Adding to 70043511 its reverse (11534007), we get a palindrome (81577518).

The spelling of 70043511 in words is "seventy million, forty-three thousand, five hundred eleven".