521700048 has 160 divisors (see below), whose sum is σ = 1545972480. Its totient is φ = 168376320.

The previous prime is 521700013. The next prime is 521700061. The reversal of 521700048 is 840007125.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 521699994 and 521700030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2238940 + ... + 2239172.

It is an arithmetic number, because the mean of its divisors is an integer number (9662328).

Almost surely, 2^521700048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521700048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772986240).

521700048 is an abundant number, since it is smaller than the sum of its proper divisors (1024272432).

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

521700048 is a wasteful number, since it uses less digits than its factorization.

521700048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 521700048 is about 22840.7541031377. The cubic root of 521700048 is about 805.0205352065.

It can be divided in two parts, 521 and 700048, that added together give a square (700569 = 837²).

The spelling of 521700048 in words is "five hundred twenty-one million, seven hundred thousand, forty-eight".