61512247 has 2 divisors, whose sum is σ = 61512248. Its totient is φ = 61512246.

The previous prime is 61512223. The next prime is 61512251. The reversal of 61512247 is 74221516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61512247 - 2⁷ = 61512119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61512547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30756123 + 30756124.

It is an arithmetic number, because the mean of its divisors is an integer number (30756124).

Almost surely, 2^61512247 is an apocalyptic number.

61512247 is a deficient number, since it is larger than the sum of its proper divisors (1).

61512247 is an equidigital number, since it uses as much as digits as its factorization.

61512247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 61512247 is about 7842.9743720096. The cubic root of 61512247 is about 394.7485383429.

The spelling of 61512247 in words is "sixty-one million, five hundred twelve thousand, two hundred forty-seven".