71480981 has 16 divisors (see below), whose sum is σ = 84248640. Its totient is φ = 59790720.

The previous prime is 71480977. The next prime is 71481013. The reversal of 71480981 is 18908417.

It is not a de Polignac number, because 71480981 - 2² = 71480977 is a prime.

It is a super-2 number, since 2×71480981² = 10219061289444722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71480951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59321 + ... + 60513.

It is an arithmetic number, because the mean of its divisors is an integer number (5265540).

Almost surely, 2^71480981 is an apocalyptic number.

It is an amenable number.

71480981 is a deficient number, since it is larger than the sum of its proper divisors (12767659).

71480981 is a wasteful number, since it uses less digits than its factorization.

71480981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 71480981 is about 8454.6425708010. The cubic root of 71480981 is about 415.0147205307.

The spelling of 71480981 in words is "seventy-one million, four hundred eighty thousand, nine hundred eighty-one".