551132731 has 2 divisors, whose sum is σ = 551132732. Its totient is φ = 551132730.

The previous prime is 551132719. The next prime is 551132759. The reversal of 551132731 is 137231155.

It is an a-pointer prime, because the next prime (551132759) can be obtained adding 551132731 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551132731 - 2²¹ = 549035579 is a prime.

It is a super-2 number, since 2×551132731² = 607494574359036722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 551132731.

It is not a weakly prime, because it can be changed into another prime (551132431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275566365 + 275566366.

It is an arithmetic number, because the mean of its divisors is an integer number (275566366).

Almost surely, 2^551132731 is an apocalyptic number.

551132731 is a deficient number, since it is larger than the sum of its proper divisors (1).

551132731 is an equidigital number, since it uses as much as digits as its factorization.

551132731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 28.

The square root of 551132731 is about 23476.2162837200. The cubic root of 551132731 is about 819.8833519378.

Adding to 551132731 its reverse (137231155), we get a palindrome (688363886).

The spelling of 551132731 in words is "five hundred fifty-one million, one hundred thirty-two thousand, seven hundred thirty-one".