71982015 has 32 divisors (see below), whose sum is σ = 133441536. Its totient is φ = 32451840.

The previous prime is 71982007. The next prime is 71982023. The reversal of 71982015 is 51028917.

71982015 = 2261² + 2262² + ... + 2274².

It is an interprime number because it is at equal distance from previous prime (71982007) and next prime (71982023).

It is not a de Polignac number, because 71982015 - 2³ = 71982007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2970 + ... + 12360.

It is an arithmetic number, because the mean of its divisors is an integer number (4170048).

Almost surely, 2^71982015 is an apocalyptic number.

71982015 is a deficient number, since it is larger than the sum of its proper divisors (61459521).

71982015 is a wasteful number, since it uses less digits than its factorization.

71982015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9479.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 71982015 is about 8484.2215317612. The cubic root of 71982015 is about 415.9821225521.

The spelling of 71982015 in words is "seventy-one million, nine hundred eighty-two thousand, fifteen".