212857154481 has 4 divisors (see below), whose sum is σ = 283809539312. Its totient is φ = 141904769652.

The previous prime is 212857154473. The next prime is 212857154533. The reversal of 212857154481 is 184451758212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212857154481 - 2³ = 212857154473 is a prime.

It is a super-2 number, since 2×212857154481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212857154481.

It is not an unprimeable number, because it can be changed into a prime (212857156481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35476192411 + ... + 35476192416.

It is an arithmetic number, because the mean of its divisors is an integer number (70952384828).

Almost surely, 2^212857154481 is an apocalyptic number.

It is an amenable number.

212857154481 is a deficient number, since it is larger than the sum of its proper divisors (70952384831).

212857154481 is an equidigital number, since it uses as much as digits as its factorization.

212857154481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70952384830.

The product of its digits is 716800, while the sum is 48.

The spelling of 212857154481 in words is "two hundred twelve billion, eight hundred fifty-seven million, one hundred fifty-four thousand, four hundred eighty-one".