71513870 has 16 divisors (see below), whose sum is σ = 129306240. Its totient is φ = 28476384.

The previous prime is 71513867. The next prime is 71513887. The reversal of 71513870 is 7831517.

It is a super-2 number, since 2×71513870² = 10228467204753800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13805 + ... + 18264.

It is an arithmetic number, because the mean of its divisors is an integer number (8081640).

Almost surely, 2^71513870 is an apocalyptic number.

71513870 is a deficient number, since it is larger than the sum of its proper divisors (57792370).

71513870 is a wasteful number, since it uses less digits than its factorization.

71513870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32299.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 71513870 is about 8456.5873731666. The cubic root of 71513870 is about 415.0783613579.

The spelling of 71513870 in words is "seventy-one million, five hundred thirteen thousand, eight hundred seventy".