71249351 has 2 divisors, whose sum is σ = 71249352. Its totient is φ = 71249350.

The previous prime is 71249327. The next prime is 71249357. The reversal of 71249351 is 15394217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71249351 - 2⁶ = 71249287 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71249357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35624675 + 35624676.

It is an arithmetic number, because the mean of its divisors is an integer number (35624676).

Almost surely, 2^71249351 is an apocalyptic number.

71249351 is a deficient number, since it is larger than the sum of its proper divisors (1).

71249351 is an equidigital number, since it uses as much as digits as its factorization.

71249351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The square root of 71249351 is about 8440.9330645374. The cubic root of 71249351 is about 414.5659583559.

The spelling of 71249351 in words is "seventy-one million, two hundred forty-nine thousand, three hundred fifty-one".