61234531 has 2 divisors, whose sum is σ = 61234532. Its totient is φ = 61234530.

The previous prime is 61234529. The next prime is 61234541. The reversal of 61234531 is 13543216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61234531 - 2¹ = 61234529 is a prime.

It is a super-2 number, since 2×61234531² = 7499335573579922, which contains 22 as substring.

Together with 61234529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 61234496 and 61234505.

It is not a weakly prime, because it can be changed into another prime (61234501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30617265 + 30617266.

It is an arithmetic number, because the mean of its divisors is an integer number (30617266).

Almost surely, 2^61234531 is an apocalyptic number.

61234531 is a deficient number, since it is larger than the sum of its proper divisors (1).

61234531 is an equidigital number, since it uses as much as digits as its factorization.

61234531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 61234531 is about 7825.2495806843. The cubic root of 61234531 is about 394.1535707356.

Adding to 61234531 its reverse (13543216), we get a palindrome (74777747).

The spelling of 61234531 in words is "sixty-one million, two hundred thirty-four thousand, five hundred thirty-one".