71231796 has 18 divisors (see below), whose sum is σ = 180058242. Its totient is φ = 23743920.

The previous prime is 71231791. The next prime is 71231807. The reversal of 71231796 is 69713217.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 67568400 + 3663396 = 8220^2 + 1914^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×71231796² = 10147937522771232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1978661 = 71231796 / (7 + 1 + 2 + 3 + 1 + 7 + 9 + 6).

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 71231796.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71231791) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 989295 + ... + 989366.

Almost surely, 2^71231796 is an apocalyptic number.

It is an amenable number.

71231796 is an abundant number, since it is smaller than the sum of its proper divisors (108826446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71231796 is a wasteful number, since it uses less digits than its factorization.

71231796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978671 (or 1978666 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 71231796 is about 8439.8931272854. The cubic root of 71231796 is about 414.5319075045.

It can be divided in two parts, 71231 and 796, that added together give a palindrome (72027).

The spelling of 71231796 in words is "seventy-one million, two hundred thirty-one thousand, seven hundred ninety-six".