61132020 has 48 divisors (see below), whose sum is σ = 172222848. Its totient is φ = 16201600.

The previous prime is 61131979. The next prime is 61132021. The reversal of 61132020 is 2023116.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61132021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6970 + ... + 13070.

It is an arithmetic number, because the mean of its divisors is an integer number (3587976).

Almost surely, 2^61132020 is an apocalyptic number.

61132020 is a gapful number since it is divisible by the number (60) 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 61132020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86111424).

61132020 is an abundant number, since it is smaller than the sum of its proper divisors (111090828).

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

61132020 is a wasteful number, since it uses less digits than its factorization.

61132020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6280 (or 6278 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 61132020 is about 7818.6968223611. The cubic root of 61132020 is about 393.9335007630.

Adding to 61132020 its reverse (2023116), we get a palindrome (63155136).

The spelling of 61132020 in words is "sixty-one million, one hundred thirty-two thousand, twenty".