513672861 has 16 divisors (see below), whose sum is σ = 738811584. Its totient is φ = 315579264.

The previous prime is 513672793. The next prime is 513672889. The reversal of 513672861 is 168276315.

It is not a de Polignac number, because 513672861 - 2¹⁴ = 513656477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513672161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13390 + ... + 34736.

It is an arithmetic number, because the mean of its divisors is an integer number (46175724).

Almost surely, 2^513672861 is an apocalyptic number.

It is an amenable number.

513672861 is a deficient number, since it is larger than the sum of its proper divisors (225138723).

513672861 is a wasteful number, since it uses less digits than its factorization.

513672861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21980.

The product of its digits is 60480, while the sum is 39.

The square root of 513672861 is about 22664.3522078175. The cubic root of 513672861 is about 800.8703345746.

The spelling of 513672861 in words is "five hundred thirteen million, six hundred seventy-two thousand, eight hundred sixty-one".