71231002 has 4 divisors (see below), whose sum is σ = 106846506. Its totient is φ = 35615500.

The previous prime is 71230997. The next prime is 71231009. The reversal of 71231002 is 20013217.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 52142841 + 19088161 = 7221^2 + 4369^2 .

It is not an unprimeable number, because it can be changed into a prime (71231009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17807749 + ... + 17807752.

Almost surely, 2^71231002 is an apocalyptic number.

71231002 is a deficient number, since it is larger than the sum of its proper divisors (35615504).

71231002 is a wasteful number, since it uses less digits than its factorization.

71231002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35615503.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 71231002 is about 8439.8460886440. The cubic root of 71231002 is about 414.5303672768.

Adding to 71231002 its reverse (20013217), we get a palindrome (91244219).

The spelling of 71231002 in words is "seventy-one million, two hundred thirty-one thousand, two".