71489551 has 8 divisors (see below), whose sum is σ = 81843104. Its totient is φ = 61171200.

The previous prime is 71489501. The next prime is 71489617. The reversal of 71489551 is 15598417.

It is a happy number.

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 71489551 - 2⁷ = 71489423 is a prime.

It is a super-2 number, since 2×71489551² = 10221511804363202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71489501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4290 + ... + 12703.

It is an arithmetic number, because the mean of its divisors is an integer number (10230388).

Almost surely, 2^71489551 is an apocalyptic number.

71489551 is a deficient number, since it is larger than the sum of its proper divisors (10353553).

71489551 is a wasteful number, since it uses less digits than its factorization.

71489551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17601.

The product of its digits is 50400, while the sum is 40.

The square root of 71489551 is about 8455.1493777461. The cubic root of 71489551 is about 415.0313055205.

The spelling of 71489551 in words is "seventy-one million, four hundred eighty-nine thousand, five hundred fifty-one".