87230551 has 2 divisors, whose sum is σ = 87230552. Its totient is φ = 87230550.

The previous prime is 87230537. The next prime is 87230557. The reversal of 87230551 is 15503278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87230551 - 2²³ = 78841943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87230557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43615275 + 43615276.

It is an arithmetic number, because the mean of its divisors is an integer number (43615276).

Almost surely, 2^87230551 is an apocalyptic number.

87230551 is a deficient number, since it is larger than the sum of its proper divisors (1).

87230551 is an equidigital number, since it uses as much as digits as its factorization.

87230551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 87230551 is about 9339.7297070097. The cubic root of 87230551 is about 443.4958278340.

It can be divided in two parts, 872305 and 51, that added together give a square (872356 = 934²).

The spelling of 87230551 in words is "eighty-seven million, two hundred thirty thousand, five hundred fifty-one".