61554132 has 18 divisors (see below), whose sum is σ = 155595258. Its totient is φ = 20518032.

The previous prime is 61554121. The next prime is 61554133. The reversal of 61554132 is 23145516.

61554132 is a `hidden beast` number, since 615 + 5 + 41 + 3 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 57244356 + 4309776 = 7566^2 + 2076^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×61554132² = 7577822332546848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61554096 and 61554105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61554133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 854883 + ... + 854954.

It is an arithmetic number, because the mean of its divisors is an integer number (8644181).

Almost surely, 2^61554132 is an apocalyptic number.

It is an amenable number.

61554132 is an abundant number, since it is smaller than the sum of its proper divisors (94041126).

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

61554132 is a wasteful number, since it uses less digits than its factorization.

61554132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709847 (or 1709842 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 61554132 is about 7845.6441418153. The cubic root of 61554132 is about 394.8381155786.

Adding to 61554132 its reverse (23145516), we get a palindrome (84699648).

The spelling of 61554132 in words is "sixty-one million, five hundred fifty-four thousand, one hundred thirty-two".