531216154 has 12 divisors (see below), whose sum is σ = 926918154. Its totient is φ = 227664024.

The previous prime is 531216139. The next prime is 531216157. The reversal of 531216154 is 451612135.

It can be written as a sum of positive squares in only one way, i.e., 521071929 + 10144225 = 22827^2 + 3185^2 .

It is not an unprimeable number, because it can be changed into a prime (531216157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2710189 + ... + 2710384.

Almost surely, 2^531216154 is an apocalyptic number.

531216154 is a deficient number, since it is larger than the sum of its proper divisors (395702000).

531216154 is a wasteful number, since it uses less digits than its factorization.

531216154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5420589 (or 5420582 counting only the distinct ones).

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

The square root of 531216154 is about 23048.1269087100. The cubic root of 531216154 is about 809.8857502833.

Adding to 531216154 its reverse (451612135), we get a palindrome (982828289).

The spelling of 531216154 in words is "five hundred thirty-one million, two hundred sixteen thousand, one hundred fifty-four".