87201031 has 2 divisors, whose sum is σ = 87201032. Its totient is φ = 87201030.

The previous prime is 87201019. The next prime is 87201053. The reversal of 87201031 is 13010278.

It is an a-pointer prime, because the next prime (87201053) can be obtained adding 87201031 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87201031 is a prime.

It is a super-2 number, since 2×87201031² = 15208039614925922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87200993 and 87201011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87201061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43600515 + 43600516.

It is an arithmetic number, because the mean of its divisors is an integer number (43600516).

Almost surely, 2^87201031 is an apocalyptic number.

87201031 is a deficient number, since it is larger than the sum of its proper divisors (1).

87201031 is an equidigital number, since it uses as much as digits as its factorization.

87201031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 87201031 is about 9338.1492277646. The cubic root of 87201031 is about 443.4457938577.

The spelling of 87201031 in words is "eighty-seven million, two hundred one thousand, thirty-one".