151321020 has 24 divisors (see below), whose sum is σ = 423699024. Its totient is φ = 40352256.

The previous prime is 151321003. The next prime is 151321033. The reversal of 151321020 is 20123151.

151321020 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1260949 + ... + 1261068.

It is an arithmetic number, because the mean of its divisors is an integer number (17654126).

Almost surely, 2^151321020 is an apocalyptic number.

151321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151321020 is an abundant number, since it is smaller than the sum of its proper divisors (272378004).

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

151321020 is a wasteful number, since it uses less digits than its factorization.

151321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522029 (or 2522027 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 151321020 is about 12301.2609109798. The cubic root of 151321020 is about 532.8844982498.

Adding to 151321020 its reverse (20123151), we get a palindrome (171444171).

The spelling of 151321020 in words is "one hundred fifty-one million, three hundred twenty-one thousand, twenty".