71433631 has 2 divisors, whose sum is σ = 71433632. Its totient is φ = 71433630.

The previous prime is 71433619. The next prime is 71433667. The reversal of 71433631 is 13633417.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71433631 - 2¹⁷ = 71302559 is a prime.

It is a super-2 number, since 2×71433631² = 10205527275688322, which contains 22 as substring.

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 71433631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71433611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35716815 + 35716816.

It is an arithmetic number, because the mean of its divisors is an integer number (35716816).

Almost surely, 2^71433631 is an apocalyptic number.

71433631 is a deficient number, since it is larger than the sum of its proper divisors (1).

71433631 is an equidigital number, since it uses as much as digits as its factorization.

71433631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 28.

The square root of 71433631 is about 8451.8418702671. The cubic root of 71433631 is about 414.9230631073.

The spelling of 71433631 in words is "seventy-one million, four hundred thirty-three thousand, six hundred thirty-one".