152731540 has 24 divisors (see below), whose sum is σ = 345408840. Its totient is φ = 56393088.

The previous prime is 152731499. The next prime is 152731541. The reversal of 152731540 is 45137251.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 110224 + 152621316 = 332^2 + 12354^2 .

It is a junction number, because it is equal to n+sod(n) for n = 152731499 and 152731508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152731541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293455 + ... + 293974.

It is an arithmetic number, because the mean of its divisors is an integer number (14392035).

Almost surely, 2^152731540 is an apocalyptic number.

152731540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

152731540 is an abundant number, since it is smaller than the sum of its proper divisors (192677300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

152731540 is a wasteful number, since it uses less digits than its factorization.

152731540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587451 (or 587449 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 152731540 is about 12358.4602600809. The cubic root of 152731540 is about 534.5351189179.

Adding to 152731540 its reverse (45137251), we get a palindrome (197868791).

The spelling of 152731540 in words is "one hundred fifty-two million, seven hundred thirty-one thousand, five hundred forty".