61595231 has 2 divisors, whose sum is σ = 61595232. Its totient is φ = 61595230.

The previous prime is 61595227. The next prime is 61595251. The reversal of 61595231 is 13259516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61595231 - 2² = 61595227 is a prime.

It is a super-2 number, since 2×61595231² = 7587944963886722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61595251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30797615 + 30797616.

It is an arithmetic number, because the mean of its divisors is an integer number (30797616).

Almost surely, 2^61595231 is an apocalyptic number.

61595231 is a deficient number, since it is larger than the sum of its proper divisors (1).

61595231 is an equidigital number, since it uses as much as digits as its factorization.

61595231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 32.

The square root of 61595231 is about 7848.2629288270. The cubic root of 61595231 is about 394.9259723474.

It can be divided in two parts, 61595 and 231, that multiplied together give a triangular number (14228445 = T₅₃₃₄).

The spelling of 61595231 in words is "sixty-one million, five hundred ninety-five thousand, two hundred thirty-one".