71214551 has 2 divisors, whose sum is σ = 71214552. Its totient is φ = 71214550.

The previous prime is 71214487. The next prime is 71214571. The reversal of 71214551 is 15541217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71214551 - 2⁶ = 71214487 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71214551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71214571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35607275 + 35607276.

It is an arithmetic number, because the mean of its divisors is an integer number (35607276).

Almost surely, 2^71214551 is an apocalyptic number.

71214551 is a deficient number, since it is larger than the sum of its proper divisors (1).

71214551 is an equidigital number, since it uses as much as digits as its factorization.

71214551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1400, while the sum is 26.

The square root of 71214551 is about 8438.8714292848. The cubic root of 71214551 is about 414.4984525021.

Adding to 71214551 its reverse (15541217), we get a palindrome (86755768).

The spelling of 71214551 in words is "seventy-one million, two hundred fourteen thousand, five hundred fifty-one".