521146323406 has 8 divisors (see below), whose sum is σ = 783393404040. Its totient is φ = 260015188728.

The previous prime is 521146323361. The next prime is 521146323421. The reversal of 521146323406 is 604323641125.

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

It is a super-2 number, since 2×521146323406² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278985321 + ... + 278987188.

It is an arithmetic number, because the mean of its divisors is an integer number (97924175505).

Almost surely, 2^521146323406 is an apocalyptic number.

521146323406 is a deficient number, since it is larger than the sum of its proper divisors (262247080634).

521146323406 is a wasteful number, since it uses less digits than its factorization.

521146323406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557972978.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 521146323406 in words is "five hundred twenty-one billion, one hundred forty-six million, three hundred twenty-three thousand, four hundred six".