61312651 has 2 divisors, whose sum is σ = 61312652. Its totient is φ = 61312650.

The previous prime is 61312649. The next prime is 61312661. The reversal of 61312651 is 15621316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61312651 - 2¹ = 61312649 is a prime.

Together with 61312649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61312661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30656325 + 30656326.

It is an arithmetic number, because the mean of its divisors is an integer number (30656326).

Almost surely, 2^61312651 is an apocalyptic number.

61312651 is a deficient number, since it is larger than the sum of its proper divisors (1).

61312651 is an equidigital number, since it uses as much as digits as its factorization.

61312651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 61312651 is about 7830.2395237949. The cubic root of 61312651 is about 394.3211134152.

Adding to 61312651 its reverse (15621316), we get a palindrome (76933967).

The spelling of 61312651 in words is "sixty-one million, three hundred twelve thousand, six hundred fifty-one".