521470477 has 8 divisors (see below), whose sum is σ = 569080512. Its totient is φ = 473894400.

The previous prime is 521470471. The next prime is 521470493. The reversal of 521470477 is 774074125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521470477 - 2¹¹ = 521468429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521470471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32077 + ... + 45517.

It is an arithmetic number, because the mean of its divisors is an integer number (71135064).

Almost surely, 2^521470477 is an apocalyptic number.

It is an amenable number.

521470477 is a deficient number, since it is larger than the sum of its proper divisors (47610035).

521470477 is a wasteful number, since it uses less digits than its factorization.

521470477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16979.

The product of its (nonzero) digits is 54880, while the sum is 37.

The square root of 521470477 is about 22835.7280812327. The cubic root of 521470477 is about 804.9024363841.

The spelling of 521470477 in words is "five hundred twenty-one million, four hundred seventy thousand, four hundred seventy-seven".