53231551 has 2 divisors, whose sum is σ = 53231552. Its totient is φ = 53231550.

The previous prime is 53231513. The next prime is 53231569. The reversal of 53231551 is 15513235.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53231551 - 2²¹ = 51134399 is a prime.

It is equal to p_3183091 and since 53231551 and 3183091 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53231051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26615775 + 26615776.

It is an arithmetic number, because the mean of its divisors is an integer number (26615776).

Almost surely, 2^53231551 is an apocalyptic number.

53231551 is a deficient number, since it is larger than the sum of its proper divisors (1).

53231551 is an equidigital number, since it uses as much as digits as its factorization.

53231551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250, while the sum is 25.

The square root of 53231551 is about 7295.9955455030. The cubic root of 53231551 is about 376.1748069588.

Adding to 53231551 its reverse (15513235), we get a palindrome (68744786).

The spelling of 53231551 in words is "fifty-three million, two hundred thirty-one thousand, five hundred fifty-one".