2157508547 has 2 divisors, whose sum is σ = 2157508548. Its totient is φ = 2157508546.

The previous prime is 2157508513. The next prime is 2157508559. The reversal of 2157508547 is 7458057512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2157508547 - 2¹⁶ = 2157443011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2157508498 and 2157508507.

It is not a weakly prime, because it can be changed into another prime (2157508567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078754273 + 1078754274.

It is an arithmetic number, because the mean of its divisors is an integer number (1078754274).

Almost surely, 2^2157508547 is an apocalyptic number.

2157508547 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157508547 is an equidigital number, since it uses as much as digits as its factorization.

2157508547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392000, while the sum is 44.

The square root of 2157508547 is about 46448.9886542215. The cubic root of 2157508547 is about 1292.1636160676.

The spelling of 2157508547 in words is "two billion, one hundred fifty-seven million, five hundred eight thousand, five hundred forty-seven".