71521048 has 8 divisors (see below), whose sum is σ = 134101980. Its totient is φ = 35760520.

The previous prime is 71521033. The next prime is 71521049. The reversal of 71521048 is 84012517.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×71521048³ (a number of 25 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71521049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4470058 + ... + 4470073.

Almost surely, 2^71521048 is an apocalyptic number.

It is an amenable number.

71521048 is a deficient number, since it is larger than the sum of its proper divisors (62580932).

71521048 is a wasteful number, since it uses less digits than its factorization.

71521048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8940137 (or 8940133 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 71521048 is about 8457.0117653933. The cubic root of 71521048 is about 415.0922483274.

The spelling of 71521048 in words is "seventy-one million, five hundred twenty-one thousand, forty-eight".