531154216 has 8 divisors (see below), whose sum is σ = 995914170. Its totient is φ = 265577104.

The previous prime is 531154207. The next prime is 531154231. The reversal of 531154216 is 612451135.

It can be written as a sum of positive squares in only one way, i.e., 531118116 + 36100 = 23046^2 + 190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33197131 + ... + 33197146.

Almost surely, 2^531154216 is an apocalyptic number.

It is an amenable number.

531154216 is a deficient number, since it is larger than the sum of its proper divisors (464759954).

531154216 is a wasteful number, since it uses less digits than its factorization.

531154216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66394283 (or 66394279 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 531154216 is about 23046.7832028680. The cubic root of 531154216 is about 809.8542724170.

The spelling of 531154216 in words is "five hundred thirty-one million, one hundred fifty-four thousand, two hundred sixteen".