261625433 has 2 divisors, whose sum is σ = 261625434. Its totient is φ = 261625432.

The previous prime is 261625423. The next prime is 261625447. The reversal of 261625433 is 334526162.

261625433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213072409 + 48553024 = 14597^2 + 6968^2 .

It is a cyclic number.

It is not a de Polignac number, because 261625433 - 2⁴ = 261625417 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 261625433.

It is not a weakly prime, because it can be changed into another prime (261625423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130812716 + 130812717.

It is an arithmetic number, because the mean of its divisors is an integer number (130812717).

Almost surely, 2^261625433 is an apocalyptic number.

It is an amenable number.

261625433 is a deficient number, since it is larger than the sum of its proper divisors (1).

261625433 is an equidigital number, since it uses as much as digits as its factorization.

261625433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 32.

The square root of 261625433 is about 16174.8395046133. The cubic root of 261625433 is about 639.5777105182.

The spelling of 261625433 in words is "two hundred sixty-one million, six hundred twenty-five thousand, four hundred thirty-three".