525840478 has 4 divisors (see below), whose sum is σ = 788760720. Its totient is φ = 262920238.

The previous prime is 525840473. The next prime is 525840487. The reversal of 525840478 is 874048525.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525840473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131460118 + ... + 131460121.

It is an arithmetic number, because the mean of its divisors is an integer number (197190180).

Almost surely, 2^525840478 is an apocalyptic number.

525840478 is a deficient number, since it is larger than the sum of its proper divisors (262920242).

525840478 is a wasteful number, since it uses less digits than its factorization.

525840478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262920241.

The product of its (nonzero) digits is 358400, while the sum is 43.

The square root of 525840478 is about 22931.2118737759. The cubic root of 525840478 is about 807.1445859601.

The spelling of 525840478 in words is "five hundred twenty-five million, eight hundred forty thousand, four hundred seventy-eight".