551651531 has 2 divisors, whose sum is σ = 551651532. Its totient is φ = 551651530.

The previous prime is 551651497. The next prime is 551651539. The reversal of 551651531 is 135156155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551651531 - 2⁶ = 551651467 is a prime.

It is a super-2 number, since 2×551651531² = 608638823309287922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551651539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275825765 + 275825766.

It is an arithmetic number, because the mean of its divisors is an integer number (275825766).

Almost surely, 2^551651531 is an apocalyptic number.

551651531 is a deficient number, since it is larger than the sum of its proper divisors (1).

551651531 is an equidigital number, since it uses as much as digits as its factorization.

551651531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11250, while the sum is 32.

The square root of 551651531 is about 23487.2631653839. The cubic root of 551651531 is about 820.1405326262.

The spelling of 551651531 in words is "five hundred fifty-one million, six hundred fifty-one thousand, five hundred thirty-one".