2151900637 has 2 divisors, whose sum is σ = 2151900638. Its totient is φ = 2151900636.

The previous prime is 2151900623. The next prime is 2151900701. The reversal of 2151900637 is 7360091512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1843757721 + 308142916 = 42939^2 + 17554^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151900637 - 2¹¹ = 2151898589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151900337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075950318 + 1075950319.

It is an arithmetic number, because the mean of its divisors is an integer number (1075950319).

Almost surely, 2^2151900637 is an apocalyptic number.

It is an amenable number.

2151900637 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151900637 is an equidigital number, since it uses as much as digits as its factorization.

2151900637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 2151900637 is about 46388.5830458314. The cubic root of 2151900637 is about 1291.0430913911.

The spelling of 2151900637 in words is "two billion, one hundred fifty-one million, nine hundred thousand, six hundred thirty-seven".