71451011 has 4 divisors (see below), whose sum is σ = 72517512. Its totient is φ = 70384512.

The previous prime is 71451007. The next prime is 71451053. The reversal of 71451011 is 11015417.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71451011 - 2² = 71451007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71454011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533150 + ... + 533283.

It is an arithmetic number, because the mean of its divisors is an integer number (18129378).

Almost surely, 2^71451011 is an apocalyptic number.

71451011 is a deficient number, since it is larger than the sum of its proper divisors (1066501).

71451011 is a wasteful number, since it uses less digits than its factorization.

71451011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066500.

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 71451011 is about 8452.8699859870. The cubic root of 71451011 is about 414.9567110215.

Adding to 71451011 its reverse (11015417), we get a palindrome (82466428).

The spelling of 71451011 in words is "seventy-one million, four hundred fifty-one thousand, eleven".