2157883537 has 2 divisors, whose sum is σ = 2157883538. Its totient is φ = 2157883536.

The previous prime is 2157883513. The next prime is 2157883547. The reversal of 2157883537 is 7353887512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1387488001 + 770395536 = 37249^2 + 27756^2 .

It is a cyclic number.

It is not a de Polignac number, because 2157883537 - 2¹¹ = 2157881489 is a prime.

It is a super-2 number, since 2×2157883537² = 9312922718511260738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2157883547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078941768 + 1078941769.

It is an arithmetic number, because the mean of its divisors is an integer number (1078941769).

Almost surely, 2^2157883537 is an apocalyptic number.

It is an amenable number.

2157883537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157883537 is an equidigital number, since it uses as much as digits as its factorization.

2157883537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 49.

The square root of 2157883537 is about 46453.0250575783. The cubic root of 2157883537 is about 1292.2384740738.

The spelling of 2157883537 in words is "two billion, one hundred fifty-seven million, eight hundred eighty-three thousand, five hundred thirty-seven".