61463251 has 2 divisors, whose sum is σ = 61463252. Its totient is φ = 61463250.

The previous prime is 61463249. The next prime is 61463317. The reversal of 61463251 is 15236416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61463251 - 2¹ = 61463249 is a prime.

Together with 61463249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61463221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30731625 + 30731626.

It is an arithmetic number, because the mean of its divisors is an integer number (30731626).

Almost surely, 2^61463251 is an apocalyptic number.

61463251 is a deficient number, since it is larger than the sum of its proper divisors (1).

61463251 is an equidigital number, since it uses as much as digits as its factorization.

61463251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 61463251 is about 7839.8501898952. The cubic root of 61463251 is about 394.6437015674.

Adding to 61463251 its reverse (15236416), we get a palindrome (76699667).

The spelling of 61463251 in words is "sixty-one million, four hundred sixty-three thousand, two hundred fifty-one".