525317940 has 192 divisors, whose sum is σ = 1928478720. Its totient is φ = 116173440.

The previous prime is 525317921. The next prime is 525317963. The reversal of 525317940 is 49713525.

525317940 is a `hidden beast` number, since 52 + 531 + 79 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 525317895 and 525317904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 114939 + ... + 119421.

It is an arithmetic number, because the mean of its divisors is an integer number (10044160).

Almost surely, 2^525317940 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 525317940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964239360).

525317940 is an abundant number, since it is smaller than the sum of its proper divisors (1403160780).

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

525317940 is a wasteful number, since it uses less digits than its factorization.

525317940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539 (or 4531 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 525317940 is about 22919.8154442831. The cubic root of 525317940 is about 806.8771388809.

The spelling of 525317940 in words is "five hundred twenty-five million, three hundred seventeen thousand, nine hundred forty".