2151432840 has 64 divisors (see below), whose sum is σ = 6520872960. Its totient is φ = 567797760.

The previous prime is 2151432809. The next prime is 2151432883. The reversal of 2151432840 is 482341512.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2151432798 and 2151432807.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80776 + ... + 104055.

It is an arithmetic number, because the mean of its divisors is an integer number (101888640).

Almost surely, 2^2151432840 is an apocalyptic number.

2151432840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151432840 is an abundant number, since it is smaller than the sum of its proper divisors (4369440120).

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

2151432840 is a wasteful number, since it uses less digits than its factorization.

2151432840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184942 (or 184938 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 2151432840 is about 46383.5406151794. The cubic root of 2151432840 is about 1290.9495322611.

The spelling of 2151432840 in words is "two billion, one hundred fifty-one million, four hundred thirty-two thousand, eight hundred forty".