71428662031 has 2 divisors, whose sum is σ = 71428662032. Its totient is φ = 71428662030.

The previous prime is 71428662007. The next prime is 71428662037. The reversal of 71428662031 is 13026682417.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71428662031 - 2³³ = 62838727439 is a prime.

It is a super-2 number, since 2×71428662031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71428662037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35714331015 + 35714331016.

It is an arithmetic number, because the mean of its divisors is an integer number (35714331016).

Almost surely, 2^71428662031 is an apocalyptic number.

71428662031 is a deficient number, since it is larger than the sum of its proper divisors (1).

71428662031 is an equidigital number, since it uses as much as digits as its factorization.

71428662031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 71428662031 in words is "seventy-one billion, four hundred twenty-eight million, six hundred sixty-two thousand, thirty-one".