61454231 has 2 divisors, whose sum is σ = 61454232. Its totient is φ = 61454230.

The previous prime is 61454213. The next prime is 61454243. The reversal of 61454231 is 13245416.

Together with previous prime (61454213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61454231 is a prime.

It is a super-2 number, since 2×61454231² = 7553245015602722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61454231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61484231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30727115 + 30727116.

It is an arithmetic number, because the mean of its divisors is an integer number (30727116).

Almost surely, 2^61454231 is an apocalyptic number.

61454231 is a deficient number, since it is larger than the sum of its proper divisors (1).

61454231 is an equidigital number, since it uses as much as digits as its factorization.

61454231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 61454231 is about 7839.2749026935. The cubic root of 61454231 is about 394.6243953952.

Adding to 61454231 its reverse (13245416), we get a palindrome (74699647).

It can be divided in two parts, 614 and 54231, that added together give a palindrome (54845).

The spelling of 61454231 in words is "sixty-one million, four hundred fifty-four thousand, two hundred thirty-one".