71400431 has 2 divisors, whose sum is σ = 71400432. Its totient is φ = 71400430.

The previous prime is 71400421. The next prime is 71400449. The reversal of 71400431 is 13400417.

It is a weak prime.

It is an emirp because it is prime and its reverse (13400417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71400431 - 2⁶ = 71400367 is a prime.

It is a super-2 number, since 2×71400431² = 10196043093971522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71400421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35700215 + 35700216.

It is an arithmetic number, because the mean of its divisors is an integer number (35700216).

Almost surely, 2^71400431 is an apocalyptic number.

71400431 is a deficient number, since it is larger than the sum of its proper divisors (1).

71400431 is an equidigital number, since it uses as much as digits as its factorization.

71400431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 71400431 is about 8449.8775730776. The cubic root of 71400431 is about 414.8587722862.

Adding to 71400431 its reverse (13400417), we get a palindrome (84800848).

The spelling of 71400431 in words is "seventy-one million, four hundred thousand, four hundred thirty-one".