71815051 has 8 divisors (see below), whose sum is σ = 89535744. Its totient is φ = 55959720.

The previous prime is 71815019. The next prime is 71815057. The reversal of 71815051 is 15051817.

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

It is a cyclic number.

It is not a de Polignac number, because 71815051 - 2⁵ = 71815019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71815057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466255 + ... + 466408.

It is an arithmetic number, because the mean of its divisors is an integer number (11191968).

Almost surely, 2^71815051 is an apocalyptic number.

71815051 is a deficient number, since it is larger than the sum of its proper divisors (17720693).

71815051 is a wasteful number, since it uses less digits than its factorization.

71815051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932681.

The product of its (nonzero) digits is 1400, while the sum is 28.

The square root of 71815051 is about 8474.3761422302. The cubic root of 71815051 is about 415.6602467404.

Adding to 71815051 its reverse (15051817), we get a palindrome (86866868).

It can be divided in two parts, 718150 and 51, that added together give a triangular number (718201 = T₁₁₉₈).

The spelling of 71815051 in words is "seventy-one million, eight hundred fifteen thousand, fifty-one".