612315551 has 2 divisors, whose sum is σ = 612315552. Its totient is φ = 612315550.

The previous prime is 612315547. The next prime is 612315559. The reversal of 612315551 is 155513216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 612315551 - 2² = 612315547 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612315559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306157775 + 306157776.

It is an arithmetic number, because the mean of its divisors is an integer number (306157776).

Almost surely, 2^612315551 is an apocalyptic number.

612315551 is a deficient number, since it is larger than the sum of its proper divisors (1).

612315551 is an equidigital number, since it uses as much as digits as its factorization.

612315551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 29.

The square root of 612315551 is about 24745.0106284075. The cubic root of 612315551 is about 849.1643695381.

Adding to 612315551 its reverse (155513216), we get a palindrome (767828767).

The spelling of 612315551 in words is "six hundred twelve million, three hundred fifteen thousand, five hundred fifty-one".