2154647701 has 2 divisors, whose sum is σ = 2154647702. Its totient is φ = 2154647700.

The previous prime is 2154647699. The next prime is 2154647731. The reversal of 2154647701 is 1077464512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1442024676 + 712623025 = 37974^2 + 26695^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154647701 - 2¹ = 2154647699 is a prime.

Together with 2154647699, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154647731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077323850 + 1077323851.

It is an arithmetic number, because the mean of its divisors is an integer number (1077323851).

Almost surely, 2^2154647701 is an apocalyptic number.

It is an amenable number.

2154647701 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154647701 is an equidigital number, since it uses as much as digits as its factorization.

2154647701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 2154647701 is about 46418.1828705088. The cubic root of 2154647701 is about 1291.5922291856.

The spelling of 2154647701 in words is "two billion, one hundred fifty-four million, six hundred forty-seven thousand, seven hundred one".