61532280 has 96 divisors (see below), whose sum is σ = 203439600. Its totient is φ = 16124928.

The previous prime is 61532249. The next prime is 61532281. The reversal of 61532280 is 8223516.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61532281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19792 + ... + 22688.

Almost surely, 2^61532280 is an apocalyptic number.

61532280 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 61532280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101719800).

61532280 is an abundant number, since it is smaller than the sum of its proper divisors (141907320).

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

61532280 is a wasteful number, since it uses less digits than its factorization.

61532280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973 (or 2966 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 61532280 is about 7844.2513983171. The cubic root of 61532280 is about 394.7913869328.

Adding to 61532280 its reverse (8223516), we get a palindrome (69755796).

The spelling of 61532280 in words is "sixty-one million, five hundred thirty-two thousand, two hundred eighty".