61265231 has 2 divisors, whose sum is σ = 61265232. Its totient is φ = 61265230.

The previous prime is 61265221. The next prime is 61265249. The reversal of 61265231 is 13256216.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61265231 is a prime.

It is a super-2 number, since 2×61265231² = 7506857058966722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61265231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61265201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30632615 + 30632616.

It is an arithmetic number, because the mean of its divisors is an integer number (30632616).

Almost surely, 2^61265231 is an apocalyptic number.

61265231 is a deficient number, since it is larger than the sum of its proper divisors (1).

61265231 is an equidigital number, since it uses as much as digits as its factorization.

61265231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 61265231 is about 7827.2109336596. The cubic root of 61265231 is about 394.2194295072.

The spelling of 61265231 in words is "sixty-one million, two hundred sixty-five thousand, two hundred thirty-one".