2185317671524 has 27 divisors (see below), whose sum is σ = 4141185168267. Its totient is φ = 1008590416704.

The previous prime is 2185317671501. The next prime is 2185317671531. The reversal of 2185317671524 is 4251767135812.

The square root of 2185317671524 is 1478282.

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

It can be written as a sum of positive squares in 4 ways, for example, as 465967333924 + 1719350337600 = 682618^2 + 1311240^2 .

It is a super-2 number, since 2×2185317671524² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 38406904 + ... + 38463760.

Almost surely, 2^{2185317671524} is an apocalyptic number.

2185317671524 is the 1478282-nd square number.

It is an amenable number.

2185317671524 is a deficient number, since it is larger than the sum of its proper divisors (1955867496743).

2185317671524 is an frugal number, since it uses more digits than its factorization.

2185317671524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113744 (or 56872 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 52.

The spelling of 2185317671524 in words is "two trillion, one hundred eighty-five billion, three hundred seventeen million, six hundred seventy-one thousand, five hundred twenty-four".