51617611 has 2 divisors, whose sum is σ = 51617612. Its totient is φ = 51617610.

The previous prime is 51617581. The next prime is 51617633. The reversal of 51617611 is 11671615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51617611 - 2¹³ = 51609419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51617611.

It is not a weakly prime, because it can be changed into another prime (51617311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25808805 + 25808806.

It is an arithmetic number, because the mean of its divisors is an integer number (25808806).

Almost surely, 2^51617611 is an apocalyptic number.

51617611 is a deficient number, since it is larger than the sum of its proper divisors (1).

51617611 is an equidigital number, since it uses as much as digits as its factorization.

51617611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 28.

The square root of 51617611 is about 7184.5397208172. The cubic root of 51617611 is about 372.3339463768. Note that the first 3 decimals are identical.

The spelling of 51617611 in words is "fifty-one million, six hundred seventeen thousand, six hundred eleven".