515172212 has 6 divisors (see below), whose sum is σ = 901551378. Its totient is φ = 257586104.

The previous prime is 515172181. The next prime is 515172223. The reversal of 515172212 is 212271515.

It can be written as a sum of positive squares in only one way, i.e., 336575716 + 178596496 = 18346^2 + 13364^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64396523 + ... + 64396530.

It is an arithmetic number, because the mean of its divisors is an integer number (150258563).

Almost surely, 2^515172212 is an apocalyptic number.

It is an amenable number.

515172212 is a deficient number, since it is larger than the sum of its proper divisors (386379166).

515172212 is a wasteful number, since it uses less digits than its factorization.

515172212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128793057 (or 128793055 counting only the distinct ones).

The product of its digits is 1400, while the sum is 26.

The square root of 515172212 is about 22697.4054023802. The cubic root of 515172212 is about 801.6487932664.

The spelling of 515172212 in words is "five hundred fifteen million, one hundred seventy-two thousand, two hundred twelve".