152521540 has 12 divisors (see below), whose sum is σ = 320295276. Its totient is φ = 61008608.

The previous prime is 152521513. The next prime is 152521541. The reversal of 152521540 is 45125251.

It can be written as a sum of positive squares in 2 ways, for example, as 103184964 + 49336576 = 10158^2 + 7024^2 .

It is not an unprimeable number, because it can be changed into a prime (152521541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3813019 + ... + 3813058.

It is an arithmetic number, because the mean of its divisors is an integer number (26691273).

Almost surely, 2^152521540 is an apocalyptic number.

152521540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

152521540 is an abundant number, since it is smaller than the sum of its proper divisors (167773736).

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

152521540 is a wasteful number, since it uses less digits than its factorization.

152521540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7626086 (or 7626084 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 152521540 is about 12349.9611335421. The cubic root of 152521540 is about 534.2900181311.

Adding to 152521540 its reverse (45125251), we get a palindrome (197646791).

The spelling of 152521540 in words is "one hundred fifty-two million, five hundred twenty-one thousand, five hundred forty".