2154437501 has 2 divisors, whose sum is σ = 2154437502. Its totient is φ = 2154437500.

The previous prime is 2154437491. The next prime is 2154437503. The reversal of 2154437501 is 1057344512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1973669476 + 180768025 = 44426^2 + 13445^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154437501 - 2⁶ = 2154437437 is a prime.

It is a Sophie Germain prime.

Together with 2154437503, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154437503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077218750 + 1077218751.

It is an arithmetic number, because the mean of its divisors is an integer number (1077218751).

Almost surely, 2^2154437501 is an apocalyptic number.

It is an amenable number.

2154437501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154437501 is an equidigital number, since it uses as much as digits as its factorization.

2154437501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 2154437501 is about 46415.9186163540. The cubic root of 2154437501 is about 1291.5502267250.

The spelling of 2154437501 in words is "two billion, one hundred fifty-four million, four hundred thirty-seven thousand, five hundred one".