2420921231 has 2 divisors, whose sum is σ = 2420921232. Its totient is φ = 2420921230.

The previous prime is 2420921203. The next prime is 2420921263. The reversal of 2420921231 is 1321290242.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2420921231 is a prime.

It is a super-2 number, since 2×2420921231² = 11721719213413110722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2420921231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2420921201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210460615 + 1210460616.

It is an arithmetic number, because the mean of its divisors is an integer number (1210460616).

Almost surely, 2^2420921231 is an apocalyptic number.

2420921231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2420921231 is an equidigital number, since it uses as much as digits as its factorization.

2420921231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2420921231 is about 49202.8579556107. The cubic root of 2420921231 is about 1342.7450283821.

The spelling of 2420921231 in words is "two billion, four hundred twenty million, nine hundred twenty-one thousand, two hundred thirty-one".