215134166457 has 48 divisors (see below), whose sum is σ = 383537404800. Its totient is φ = 118694691360.

The previous prime is 215134166449. The next prime is 215134166459. The reversal of 215134166457 is 754661431512.

It is a happy number.

215134166457 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 34 + 166 + 457 = 666.

It is not a de Polignac number, because 215134166457 - 2³ = 215134166449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215134166459) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2765269 + ... + 2842002.

It is an arithmetic number, because the mean of its divisors is an integer number (7990362600).

Almost surely, 2^215134166457 is an apocalyptic number.

215134166457 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

215134166457 is a deficient number, since it is larger than the sum of its proper divisors (168403238343).

215134166457 is a wasteful number, since it uses less digits than its factorization.

215134166457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5607323 (or 5607310 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

Adding to 215134166457 its reverse (754661431512), we get a palindrome (969795597969).

The spelling of 215134166457 in words is "two hundred fifteen billion, one hundred thirty-four million, one hundred sixty-six thousand, four hundred fifty-seven".