214557488223961 has 3 divisors (see below), whose sum is σ = 214557502871743. Its totient is φ = 214557473576180.

The previous prime is 214557488223941. The next prime is 214557488224043. The reversal of 214557488223961 is 169322884755412.

The square root of 214557488223961 is 14647781.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 487230524361 + 214070257699600 = 698019^2 + 14631140^2 .

It is not a de Polignac number, because 214557488223961 - 2¹³ = 214557488215769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214557488223941) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7323891 + ... + 21971671.

Almost surely, 2^{214557488223961} is an apocalyptic number.

214557488223961 is the 14647781-st square number.

214557488223961 is the 7323891-st centered octagonal number.

It is an amenable number.

214557488223961 is a deficient number, since it is larger than the sum of its proper divisors (14647782).

214557488223961 is an frugal number, since it uses more digits than its factorization.

214557488223961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29295562 (or 14647781 counting only the distinct ones).

The product of its digits is 232243200, while the sum is 67.

The spelling of 214557488223961 in words is "two hundred fourteen trillion, five hundred fifty-seven billion, four hundred eighty-eight million, two hundred twenty-three thousand, nine hundred sixty-one".