61343431 has 2 divisors, whose sum is σ = 61343432. Its totient is φ = 61343430.

The previous prime is 61343423. The next prime is 61343459. The reversal of 61343431 is 13434316.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61343431 - 2³ = 61343423 is a prime.

It is a super-2 number, since 2×61343431² = 7526033053703522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61343396 and 61343405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61343731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30671715 + 30671716.

It is an arithmetic number, because the mean of its divisors is an integer number (30671716).

Almost surely, 2^61343431 is an apocalyptic number.

61343431 is a deficient number, since it is larger than the sum of its proper divisors (1).

61343431 is an equidigital number, since it uses as much as digits as its factorization.

61343431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

The square root of 61343431 is about 7832.2047343006. The cubic root of 61343431 is about 394.3870876919.

Adding to 61343431 its reverse (13434316), we get a palindrome (74777747).

It can be divided in two parts, 613 and 43431, that added together give a palindrome (44044).

The spelling of 61343431 in words is "sixty-one million, three hundred forty-three thousand, four hundred thirty-one".