612516431 has 2 divisors, whose sum is σ = 612516432. Its totient is φ = 612516430.

The previous prime is 612516403. The next prime is 612516461. The reversal of 612516431 is 134615216.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 612516431 - 2⁶ = 612516367 is a prime.

It is a super-2 number, since 2×612516431² = 750352756489955522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 612516394 and 612516403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612516461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306258215 + 306258216.

It is an arithmetic number, because the mean of its divisors is an integer number (306258216).

Almost surely, 2^612516431 is an apocalyptic number.

612516431 is a deficient number, since it is larger than the sum of its proper divisors (1).

612516431 is an equidigital number, since it uses as much as digits as its factorization.

612516431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 612516431 is about 24749.0692956321. The cubic root of 612516431 is about 849.2572200778.

The spelling of 612516431 in words is "six hundred twelve million, five hundred sixteen thousand, four hundred thirty-one".