51553507 has 2 divisors, whose sum is σ = 51553508. Its totient is φ = 51553506.

The previous prime is 51553499. The next prime is 51553547. The reversal of 51553507 is 70535515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51553507 - 2³ = 51553499 is a prime.

It is equal to p_3088642 and since 51553507 and 3088642 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51553547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25776753 + 25776754.

It is an arithmetic number, because the mean of its divisors is an integer number (25776754).

Almost surely, 2^51553507 is an apocalyptic number.

51553507 is a deficient number, since it is larger than the sum of its proper divisors (1).

51553507 is an equidigital number, since it uses as much as digits as its factorization.

51553507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13125, while the sum is 31.

The square root of 51553507 is about 7180.0770887227. The cubic root of 51553507 is about 372.1797484699.

The spelling of 51553507 in words is "fifty-one million, five hundred fifty-three thousand, five hundred seven".