61255507 has 2 divisors, whose sum is σ = 61255508. Its totient is φ = 61255506.

The previous prime is 61255501. The next prime is 61255549. The reversal of 61255507 is 70555216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61255507 - 2³ = 61255499 is a prime.

It is not a weakly prime, because it can be changed into another prime (61255501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30627753 + 30627754.

It is an arithmetic number, because the mean of its divisors is an integer number (30627754).

Almost surely, 2^61255507 is an apocalyptic number.

61255507 is a deficient number, since it is larger than the sum of its proper divisors (1).

61255507 is an equidigital number, since it uses as much as digits as its factorization.

61255507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 61255507 is about 7826.5897426657. The cubic root of 61255507 is about 394.1985716052.

The spelling of 61255507 in words is "sixty-one million, two hundred fifty-five thousand, five hundred seven".