71215254 has 32 divisors (see below), whose sum is σ = 172644480. Its totient is φ = 21580200.

The previous prime is 71215253. The next prime is 71215283. The reversal of 71215254 is 45251217.

It is a super-2 number, since 2×71215254² = 10143224804569032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71215253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59352 + ... + 60539.

It is an arithmetic number, because the mean of its divisors is an integer number (5395140).

Almost surely, 2^71215254 is an apocalyptic number.

71215254 is an abundant number, since it is smaller than the sum of its proper divisors (101429226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71215254 is a wasteful number, since it uses less digits than its factorization.

71215254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119913 (or 119907 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 71215254 is about 8438.9130816711. The cubic root of 71215254 is about 414.4998164156.

The spelling of 71215254 in words is "seventy-one million, two hundred fifteen thousand, two hundred fifty-four".