61523380 has 48 divisors (see below), whose sum is σ = 132491520. Its totient is φ = 23990400.

The previous prime is 61523359. The next prime is 61523381. The reversal of 61523380 is 8332516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61523381) 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, 257301 + ... + 257539.

It is an arithmetic number, because the mean of its divisors is an integer number (2760240).

Almost surely, 2^61523380 is an apocalyptic number.

It is an amenable number.

61523380 is an abundant number, since it is smaller than the sum of its proper divisors (70968140).

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

61523380 is a wasteful number, since it uses less digits than its factorization.

61523380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 61523380 is about 7843.6840833884. The cubic root of 61523380 is about 394.7723518683.

Adding to 61523380 its reverse (8332516), we get a palindrome (69855896).

The spelling of 61523380 in words is "sixty-one million, five hundred twenty-three thousand, three hundred eighty".