551531147 has 2 divisors, whose sum is σ = 551531148. Its totient is φ = 551531146.

The previous prime is 551531117. The next prime is 551531159. The reversal of 551531147 is 741135155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551531147 - 2⁸ = 551530891 is a prime.

It is a super-2 number, since 2×551531147² = 608373212222271218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (551531117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275765573 + 275765574.

It is an arithmetic number, because the mean of its divisors is an integer number (275765574).

Almost surely, 2^551531147 is an apocalyptic number.

551531147 is a deficient number, since it is larger than the sum of its proper divisors (1).

551531147 is an equidigital number, since it uses as much as digits as its factorization.

551531147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 32.

The square root of 551531147 is about 23484.7002748598. The cubic root of 551531147 is about 820.0808699738.

The spelling of 551531147 in words is "five hundred fifty-one million, five hundred thirty-one thousand, one hundred forty-seven".