61532420 has 12 divisors (see below), whose sum is σ = 129218124. Its totient is φ = 24612960.

The previous prime is 61532413. The next prime is 61532423. The reversal of 61532420 is 2423516.

It can be written as a sum of positive squares in 2 ways, for example, as 11519236 + 50013184 = 3394^2 + 7072^2 .

It is a super-2 number, since 2×61532420² = 7572477422112800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61532423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1538291 + ... + 1538330.

It is an arithmetic number, because the mean of its divisors is an integer number (10768177).

Almost surely, 2^61532420 is an apocalyptic number.

It is an amenable number.

61532420 is an abundant number, since it is smaller than the sum of its proper divisors (67685704).

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

61532420 is a wasteful number, since it uses less digits than its factorization.

61532420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076630 (or 3076628 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 61532420 is about 7844.2603220444. The cubic root of 61532420 is about 394.7916863461.

Adding to 61532420 its reverse (2423516), we get a palindrome (63955936).

The spelling of 61532420 in words is "sixty-one million, five hundred thirty-two thousand, four hundred twenty".