53861550 has 48 divisors (see below), whose sum is σ = 134602992. Its totient is φ = 14252800.

The previous prime is 53861543. The next prime is 53861569. The reversal of 53861550 is 5516835.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19240 + ... + 21860.

It is an arithmetic number, because the mean of its divisors is an integer number (2804229).

Almost surely, 2^53861550 is an apocalyptic number.

53861550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 53861550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67301496).

53861550 is an abundant number, since it is smaller than the sum of its proper divisors (80741442).

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

53861550 is a wasteful number, since it uses less digits than its factorization.

53861550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773 (or 2768 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 53861550 is about 7339.0428531246. The cubic root of 53861550 is about 377.6530087457.

The spelling of 53861550 in words is "fifty-three million, eight hundred sixty-one thousand, five hundred fifty".