61232540 has 24 divisors (see below), whose sum is σ = 131326272. Its totient is φ = 23971520.

The previous prime is 61232537. The next prime is 61232551. The reversal of 61232540 is 4523216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31631 + ... + 33510.

It is an arithmetic number, because the mean of its divisors is an integer number (5471928).

Almost surely, 2^61232540 is an apocalyptic number.

It is an amenable number.

61232540 is an abundant number, since it is smaller than the sum of its proper divisors (70093732).

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

61232540 is a wasteful number, since it uses less digits than its factorization.

61232540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65197 (or 65195 counting only the distinct ones).

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

The square root of 61232540 is about 7825.1223632605. The cubic root of 61232540 is about 394.1492988090.

Adding to 61232540 its reverse (4523216), we get a palindrome (65755756).

The spelling of 61232540 in words is "sixty-one million, two hundred thirty-two thousand, five hundred forty".