2145133254 has 48 divisors (see below), whose sum is σ = 4734508464. Its totient is φ = 647454720.

The previous prime is 2145133241. The next prime is 2145133261. The reversal of 2145133254 is 4523315412.

It is a congruent number.

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, 180834 + ... + 192330.

It is an arithmetic number, because the mean of its divisors is an integer number (98635593).

Almost surely, 2^2145133254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145133254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2367254232).

2145133254 is an abundant number, since it is smaller than the sum of its proper divisors (2589375210).

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

2145133254 is a wasteful number, since it uses less digits than its factorization.

2145133254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11781 (or 11770 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 2145133254 is about 46315.5832738831. The cubic root of 2145133254 is about 1289.6882955797.

Adding to 2145133254 its reverse (4523315412), we get a palindrome (6668448666).

The spelling of 2145133254 in words is "two billion, one hundred forty-five million, one hundred thirty-three thousand, two hundred fifty-four".