513109172 has 6 divisors (see below), whose sum is σ = 897941058. Its totient is φ = 256554584.

The previous prime is 513109171. The next prime is 513109243. The reversal of 513109172 is 271901315.

It can be written as a sum of positive squares in only one way, i.e., 351412516 + 161696656 = 18746^2 + 12716^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513109171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64138643 + ... + 64138650.

It is an arithmetic number, because the mean of its divisors is an integer number (149656843).

Almost surely, 2^513109172 is an apocalyptic number.

It is an amenable number.

513109172 is a deficient number, since it is larger than the sum of its proper divisors (384831886).

513109172 is a wasteful number, since it uses less digits than its factorization.

513109172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128277297 (or 128277295 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 513109172 is about 22651.9132083804. The cubic root of 513109172 is about 800.5772770888.

It can be divided in two parts, 513 and 109172, that multiplied together give a triangular number (56005236 = T₁₀₅₈₃).

The spelling of 513109172 in words is "five hundred thirteen million, one hundred nine thousand, one hundred seventy-two".