71036551 has 4 divisors (see below), whose sum is σ = 71700552. Its totient is φ = 70372552.

The previous prime is 71036533. The next prime is 71036569. The reversal of 71036551 is 15563017.

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

It is an interprime number because it is at equal distance from previous prime (71036533) and next prime (71036569).

It is a cyclic number.

It is not a de Polignac number, because 71036551 - 2¹¹ = 71034503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71036501) 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, 331840 + ... + 332053.

It is an arithmetic number, because the mean of its divisors is an integer number (17925138).

Almost surely, 2^71036551 is an apocalyptic number.

71036551 is a deficient number, since it is larger than the sum of its proper divisors (664001).

71036551 is a wasteful number, since it uses less digits than its factorization.

71036551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664000.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 71036551 is about 8428.3183969283. The cubic root of 71036551 is about 414.1528195737.

Adding to 71036551 its reverse (15563017), we get a palindrome (86599568).

The spelling of 71036551 in words is "seventy-one million, thirty-six thousand, five hundred fifty-one".