2151224077 has 2 divisors, whose sum is σ = 2151224078. Its totient is φ = 2151224076.

The previous prime is 2151224051. The next prime is 2151224123. The reversal of 2151224077 is 7704221512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1583164521 + 568059556 = 39789^2 + 23834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151224077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151224177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075612038 + 1075612039.

It is an arithmetic number, because the mean of its divisors is an integer number (1075612039).

Almost surely, 2^2151224077 is an apocalyptic number.

It is an amenable number.

2151224077 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151224077 is an equidigital number, since it uses as much as digits as its factorization.

2151224077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2151224077 is about 46381.2901610121. The cubic root of 2151224077 is about 1290.9077754050.

Adding to 2151224077 its reverse (7704221512), we get a palindrome (9855445589).

The spelling of 2151224077 in words is "two billion, one hundred fifty-one million, two hundred twenty-four thousand, seventy-seven".