71331402 has 16 divisors (see below), whose sum is σ = 143078112. Its totient is φ = 23707920.

The previous prime is 71331397. The next prime is 71331409. The reversal of 71331402 is 20413317.

It is a super-2 number, since 2×71331402² = 10176337822571208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71331409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15049 + ... + 19212.

It is an arithmetic number, because the mean of its divisors is an integer number (8942382).

Almost surely, 2^71331402 is an apocalyptic number.

71331402 is an abundant number, since it is smaller than the sum of its proper divisors (71746710).

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

71331402 is a wasteful number, since it uses less digits than its factorization.

71331402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34613.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 71331402 is about 8445.7919699694. The cubic root of 71331402 is about 414.7250358392.

Adding to 71331402 its reverse (20413317), we get a palindrome (91744719).

The spelling of 71331402 in words is "seventy-one million, three hundred thirty-one thousand, four hundred two".