151231540 has 24 divisors (see below), whose sum is σ = 318031560. Its totient is φ = 60407808.

The previous prime is 151231537. The next prime is 151231567. The reversal of 151231540 is 45132151.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11329956 + 139901584 = 3366^2 + 11828^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10464 + ... + 20296.

It is an arithmetic number, because the mean of its divisors is an integer number (13251315).

Almost surely, 2^151231540 is an apocalyptic number.

151231540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151231540 is an abundant number, since it is smaller than the sum of its proper divisors (166800020).

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

151231540 is a wasteful number, since it uses less digits than its factorization.

151231540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10611 (or 10609 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 151231540 is about 12297.6233476229. The cubic root of 151231540 is about 532.7794414493.

Adding to 151231540 its reverse (45132151), we get a palindrome (196363691).

The spelling of 151231540 in words is "one hundred fifty-one million, two hundred thirty-one thousand, five hundred forty".