551780137 has 2 divisors, whose sum is σ = 551780138. Its totient is φ = 551780136.

The previous prime is 551780093. The next prime is 551780147. The reversal of 551780137 is 731087155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335219481 + 216560656 = 18309^2 + 14716^2 .

It is a cyclic number.

It is not a de Polignac number, because 551780137 - 2¹⁹ = 551255849 is a prime.

It is a super-2 number, since 2×551780137² = 608922639175477538, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 551780096 and 551780105.

It is not a weakly prime, because it can be changed into another prime (551780147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275890068 + 275890069.

It is an arithmetic number, because the mean of its divisors is an integer number (275890069).

Almost surely, 2^551780137 is an apocalyptic number.

It is an amenable number.

551780137 is a deficient number, since it is larger than the sum of its proper divisors (1).

551780137 is an equidigital number, since it uses as much as digits as its factorization.

551780137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400, while the sum is 37.

The square root of 551780137 is about 23490.0007875692. Note that the first 3 decimals coincide. The cubic root of 551780137 is about 820.2042605366.

Subtracting from 551780137 its sum of digits (37), we obtain a square (551780100 = 23490²).

The spelling of 551780137 in words is "five hundred fifty-one million, seven hundred eighty thousand, one hundred thirty-seven".