71772115 has 8 divisors (see below), whose sum is σ = 86979888. Its totient is φ = 56848800.

The previous prime is 71772109. The next prime is 71772137. The reversal of 71772115 is 51127717.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71772115 - 2⁵ = 71772083 is a prime.

It is a Duffinian 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, 70557 + ... + 71566.

It is an arithmetic number, because the mean of its divisors is an integer number (10872486).

Almost surely, 2^71772115 is an apocalyptic number.

71772115 is a deficient number, since it is larger than the sum of its proper divisors (15207773).

71772115 is a wasteful number, since it uses less digits than its factorization.

71772115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142229.

The product of its digits is 3430, while the sum is 31.

The square root of 71772115 is about 8471.8424796499. The cubic root of 71772115 is about 415.5773934204.

The spelling of 71772115 in words is "seventy-one million, seven hundred seventy-two thousand, one hundred fifteen".