511322397 has 4 divisors (see below), whose sum is σ = 681763200. Its totient is φ = 340881596.

The previous prime is 511322389. The next prime is 511322431. The reversal of 511322397 is 793223115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 511322397 - 2³ = 511322389 is a prime.

It is a super-2 number, since 2×511322397² = 522901187347651218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511322347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85220397 + ... + 85220402.

It is an arithmetic number, because the mean of its divisors is an integer number (170440800).

Almost surely, 2^511322397 is an apocalyptic number.

It is an amenable number.

511322397 is a deficient number, since it is larger than the sum of its proper divisors (170440803).

511322397 is a wasteful number, since it uses less digits than its factorization.

511322397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170440802.

The product of its digits is 11340, while the sum is 33.

The square root of 511322397 is about 22612.4389883091. The cubic root of 511322397 is about 799.6469259672.

The spelling of 511322397 in words is "five hundred eleven million, three hundred twenty-two thousand, three hundred ninety-seven".