30626261 has 2 divisors, whose sum is σ = 30626262. Its totient is φ = 30626260.

The previous prime is 30626249. The next prime is 30626279. The reversal of 30626261 is 16262603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30184036 + 442225 = 5494^2 + 665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30626261 is a prime.

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 30626261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30622261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15313130 + 15313131.

It is an arithmetic number, because the mean of its divisors is an integer number (15313131).

Almost surely, 2^30626261 is an apocalyptic number.

It is an amenable number.

30626261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30626261 is an equidigital number, since it uses as much as digits as its factorization.

30626261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 30626261 is about 5534.0998364684. The cubic root of 30626261 is about 312.8705313672.

Adding to 30626261 its reverse (16262603), we get a palindrome (46888864).

The spelling of 30626261 in words is "thirty million, six hundred twenty-six thousand, two hundred sixty-one".