2153506450 has 48 divisors (see below), whose sum is σ = 4378005504. Its totient is φ = 784569600.

The previous prime is 2153506423. The next prime is 2153506469. The reversal of 2153506450 is 546053512.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14514 + ... + 67213.

It is an arithmetic number, because the mean of its divisors is an integer number (91208448).

Almost surely, 2^2153506450 is an apocalyptic number.

2153506450 is an abundant number, since it is smaller than the sum of its proper divisors (2224499054).

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

2153506450 is a wasteful number, since it uses less digits than its factorization.

2153506450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81787 (or 81782 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 2153506450 is about 46405.8880962319. Note that the first 3 decimals coincide. The cubic root of 2153506450 is about 1291.3641499427.

Adding to 2153506450 its reverse (546053512), we get a palindrome (2699559962).

The spelling of 2153506450 in words is "two billion, one hundred fifty-three million, five hundred six thousand, four hundred fifty".