71400531 has 8 divisors (see below), whose sum is σ = 95398144. Its totient is φ = 47501640.

The previous prime is 71400529. The next prime is 71400541. The reversal of 71400531 is 13500417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71400531 - 2¹ = 71400529 is a prime.

It is a super-2 number, since 2×71400531² = 10196071654163922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71400498 and 71400507.

It is not an unprimeable number, because it can be changed into a prime (71400541) 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, 22975 + ... + 25896.

It is an arithmetic number, because the mean of its divisors is an integer number (11924768).

Almost surely, 2^71400531 is an apocalyptic number.

71400531 is a deficient number, since it is larger than the sum of its proper divisors (23997613).

71400531 is a wasteful number, since it uses less digits than its factorization.

71400531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49361.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 71400531 is about 8449.8834903210. The cubic root of 71400531 is about 414.8589659631.

Adding to 71400531 its reverse (13500417), we get a palindrome (84900948).

The spelling of 71400531 in words is "seventy-one million, four hundred thousand, five hundred thirty-one".