61551593 has 2 divisors, whose sum is σ = 61551594. Its totient is φ = 61551592.

The previous prime is 61551587. The next prime is 61551631. The reversal of 61551593 is 39515516.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34480384 + 27071209 = 5872^2 + 5203^2 .

It is a cyclic number.

It is not a de Polignac number, because 61551593 - 2¹⁰ = 61550569 is a prime.

It is not a weakly prime, because it can be changed into another prime (61553593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30775796 + 30775797.

It is an arithmetic number, because the mean of its divisors is an integer number (30775797).

Almost surely, 2^61551593 is an apocalyptic number.

It is an amenable number.

61551593 is a deficient number, since it is larger than the sum of its proper divisors (1).

61551593 is an equidigital number, since it uses as much as digits as its factorization.

61551593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20250, while the sum is 35.

The square root of 61551593 is about 7845.4823306155. The cubic root of 61551593 is about 394.8326867107.

The spelling of 61551593 in words is "sixty-one million, five hundred fifty-one thousand, five hundred ninety-three".