2621212427 has 2 divisors, whose sum is σ = 2621212428. Its totient is φ = 2621212426.

The previous prime is 2621212397. The next prime is 2621212493. The reversal of 2621212427 is 7242121262.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2621212427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2621212427.

It is not a weakly prime, because it can be changed into another prime (2621272427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310606213 + 1310606214.

It is an arithmetic number, because the mean of its divisors is an integer number (1310606214).

Almost surely, 2^2621212427 is an apocalyptic number.

2621212427 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621212427 is an equidigital number, since it uses as much as digits as its factorization.

2621212427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 29.

The square root of 2621212427 is about 51197.7775591871. Note that the first 3 decimals coincide. The cubic root of 2621212427 is about 1378.7983004685.

Adding to 2621212427 its reverse (7242121262), we get a palindrome (9863333689).

The spelling of 2621212427 in words is "two billion, six hundred twenty-one million, two hundred twelve thousand, four hundred twenty-seven".