521342632 has 8 divisors (see below), whose sum is σ = 977517450. Its totient is φ = 260671312.

The previous prime is 521342629. The next prime is 521342639. The reversal of 521342632 is 236243125.

It can be written as a sum of positive squares in only one way, i.e., 404572996 + 116769636 = 20114^2 + 10806^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 521342632.

It is not an unprimeable number, because it can be changed into a prime (521342639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32583907 + ... + 32583922.

Almost surely, 2^521342632 is an apocalyptic number.

It is an amenable number.

521342632 is a deficient number, since it is larger than the sum of its proper divisors (456174818).

521342632 is a wasteful number, since it uses less digits than its factorization.

521342632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65167835 (or 65167831 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 521342632 is about 22832.9286776795. The cubic root of 521342632 is about 804.8366537131.

Adding to 521342632 its reverse (236243125), we get a palindrome (757585757).

The spelling of 521342632 in words is "five hundred twenty-one million, three hundred forty-two thousand, six hundred thirty-two".