2151473720 has 64 divisors (see below), whose sum is σ = 5333286240. Its totient is φ = 774592000.

The previous prime is 2151473713. The next prime is 2151473741. The reversal of 2151473720 is 273741512.

It is a congruent number.

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, 20234 + ... + 68646.

Almost surely, 2^2151473720 is an apocalyptic number.

2151473720 is a gapful number since it is divisible by the number (20) 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 2151473720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2666643120).

2151473720 is an abundant number, since it is smaller than the sum of its proper divisors (3181812520).

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

2151473720 is a wasteful number, since it uses less digits than its factorization.

2151473720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48536 (or 48532 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 2151473720 is about 46383.9812866468. The cubic root of 2151473720 is about 1290.9577087783.

The spelling of 2151473720 in words is "two billion, one hundred fifty-one million, four hundred seventy-three thousand, seven hundred twenty".