2157215351 has 2 divisors, whose sum is σ = 2157215352. Its totient is φ = 2157215350.

The previous prime is 2157215279. The next prime is 2157215393. The reversal of 2157215351 is 1535127512.

2157215351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2157215351 - 2³⁰ = 1083473527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2157217351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078607675 + 1078607676.

It is an arithmetic number, because the mean of its divisors is an integer number (1078607676).

Almost surely, 2^2157215351 is an apocalyptic number.

2157215351 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157215351 is an equidigital number, since it uses as much as digits as its factorization.

2157215351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 32.

The square root of 2157215351 is about 46445.8324395203. The cubic root of 2157215351 is about 1292.1050802830.

The spelling of 2157215351 in words is "two billion, one hundred fifty-seven million, two hundred fifteen thousand, three hundred fifty-one".