61143005 has 64 divisors (see below), whose sum is σ = 97320960. Its totient is φ = 35769600.

The previous prime is 61143001. The next prime is 61143011. The reversal of 61143005 is 50034116.

It is not a de Polignac number, because 61143005 - 2² = 61143001 is a prime.

It is a super-3 number, since 3×61143005³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61143001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 560891 + ... + 560999.

It is an arithmetic number, because the mean of its divisors is an integer number (1520640).

Almost surely, 2^61143005 is an apocalyptic number.

It is an amenable number.

61143005 is a deficient number, since it is larger than the sum of its proper divisors (36177955).

61143005 is a wasteful number, since it uses less digits than its factorization.

61143005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 61143005 is about 7819.3992736015. The cubic root of 61143005 is about 393.9570950557.

Subtracting from 61143005 its reverse (50034116), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 6114 and 3005, that added together give a palindrome (9119).

The spelling of 61143005 in words is "sixty-one million, one hundred forty-three thousand, five".