61131450 has 48 divisors (see below), whose sum is σ = 152847360. Its totient is φ = 16168320.

The previous prime is 61131383. The next prime is 61131461. The reversal of 61131450 is 5413116.

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, 17446 + ... + 20654.

It is an arithmetic number, because the mean of its divisors is an integer number (3184320).

Almost surely, 2^61131450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61131450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76423680).

61131450 is an abundant number, since it is smaller than the sum of its proper divisors (91715910).

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

61131450 is a wasteful number, since it uses less digits than its factorization.

61131450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351 (or 3346 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 61131450 is about 7818.6603711889. The cubic root of 61131450 is about 393.9322764030.

Adding to 61131450 its reverse (5413116), we get a palindrome (66544566).

The spelling of 61131450 in words is "sixty-one million, one hundred thirty-one thousand, four hundred fifty".