151531020 has 48 divisors (see below), whose sum is σ = 471431520. Its totient is φ = 40408128.

The previous prime is 151530983. The next prime is 151531027. The reversal of 151531020 is 20135151.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 151530984 and 151531002.

It is not an unprimeable number, because it can be changed into a prime (151531027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139767 + ... + 140846.

It is an arithmetic number, because the mean of its divisors is an integer number (9821490).

Almost surely, 2^151531020 is an apocalyptic number.

151531020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151531020 is an abundant number, since it is smaller than the sum of its proper divisors (319900500).

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

151531020 is a wasteful number, since it uses less digits than its factorization.

151531020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280631 (or 280623 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 151531020 is about 12309.7936619588. The cubic root of 151531020 is about 533.1308927862.

Adding to 151531020 its reverse (20135151), we get a palindrome (171666171).

The spelling of 151531020 in words is "one hundred fifty-one million, five hundred thirty-one thousand, twenty".