151731720 has 192 divisors, whose sum is σ = 593424000. Its totient is φ = 32845824.

The previous prime is 151731707. The next prime is 151731721. The reversal of 151731720 is 27137151.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (151731721) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 46296 + ... + 49464.

It is an arithmetic number, because the mean of its divisors is an integer number (3090750).

Almost surely, 2^151731720 is an apocalyptic number.

151731720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 151731720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296712000).

151731720 is an abundant number, since it is smaller than the sum of its proper divisors (441692280).

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

151731720 is a wasteful number, since it uses less digits than its factorization.

151731720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212 (or 3205 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 151731720 is about 12317.9430100971. The cubic root of 151731720 is about 533.3661629097.

Adding to 151731720 its reverse (27137151), we get a palindrome (178868871).

The spelling of 151731720 in words is "one hundred fifty-one million, seven hundred thirty-one thousand, seven hundred twenty".