71215151501 has 24 divisors (see below), whose sum is σ = 77441874120. Its totient is φ = 65458848000.

The previous prime is 71215151461. The next prime is 71215151509. The reversal of 71215151501 is 10515151217.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 1914062500 + 69301089001 = 43750^2 + 263251^2 .

It is not a de Polignac number, because 71215151501 - 2²² = 71210957197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71215151509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60300131 + ... + 60301311.

It is an arithmetic number, because the mean of its divisors is an integer number (3226744755).

Almost surely, 2^71215151501 is an apocalyptic number.

It is an amenable number.

71215151501 is a deficient number, since it is larger than the sum of its proper divisors (6226722619).

71215151501 is a wasteful number, since it uses less digits than its factorization.

71215151501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417 (or 2404 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 29.

The spelling of 71215151501 in words is "seventy-one billion, two hundred fifteen million, one hundred fifty-one thousand, five hundred one".