2151015420 has 48 divisors (see below), whose sum is σ = 6053449248. Its totient is φ = 570689280.

The previous prime is 2151015413. The next prime is 2151015421. The reversal of 2151015420 is 245101512.

2151015420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151015421) 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, 79171 + ... + 102810.

It is an arithmetic number, because the mean of its divisors is an integer number (126113526).

Almost surely, 2^2151015420 is an apocalyptic number.

2151015420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151015420 is an abundant number, since it is smaller than the sum of its proper divisors (3902433828).

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

2151015420 is a wasteful number, since it uses less digits than its factorization.

2151015420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182190 (or 182188 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2151015420 is about 46379.0407404034. The cubic root of 2151015420 is about 1290.8660370515.

Adding to 2151015420 its reverse (245101512), we get a palindrome (2396116932).

The spelling of 2151015420 in words is "two billion, one hundred fifty-one million, fifteen thousand, four hundred twenty".