70278513 has 16 divisors (see below), whose sum is σ = 97838400. Its totient is φ = 44815680.

The previous prime is 70278491. The next prime is 70278517. The reversal of 70278513 is 31587207.

It is not a de Polignac number, because 70278513 - 2²⁵ = 36724081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70278517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5778 + ... + 13188.

It is an arithmetic number, because the mean of its divisors is an integer number (6114900).

Almost surely, 2^70278513 is an apocalyptic number.

It is an amenable number.

70278513 is a deficient number, since it is larger than the sum of its proper divisors (27559887).

70278513 is a wasteful number, since it uses less digits than its factorization.

70278513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7552.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 70278513 is about 8383.2280775367. The cubic root of 70278513 is about 412.6743931115.

The spelling of 70278513 in words is "seventy million, two hundred seventy-eight thousand, five hundred thirteen".