513400431 has 8 divisors (see below), whose sum is σ = 694751104. Its totient is φ = 337158360.

The previous prime is 513400429. The next prime is 513400451. The reversal of 513400431 is 134004315.

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

It is not a de Polignac number, because 513400431 - 2¹ = 513400429 is a prime.

It is a super-2 number, since 2×513400431² = 527160005101971522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513400398 and 513400407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513400451) 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, 1276915 + ... + 1277316.

It is an arithmetic number, because the mean of its divisors is an integer number (86843888).

Almost surely, 2^513400431 is an apocalyptic number.

513400431 is a deficient number, since it is larger than the sum of its proper divisors (181350673).

513400431 is a wasteful number, since it uses less digits than its factorization.

513400431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554301.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 513400431 is about 22658.3413117554. The cubic root of 513400431 is about 800.7287271402.

Adding to 513400431 its reverse (134004315), we get a palindrome (647404746).

The spelling of 513400431 in words is "five hundred thirteen million, four hundred thousand, four hundred thirty-one".