87022157 has 4 divisors (see below), whose sum is σ = 87169500. Its totient is φ = 86874816.

The previous prime is 87022151. The next prime is 87022171. The reversal of 87022157 is 75122078.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30261001 + 56761156 = 5501^2 + 7534^2 .

It is a cyclic number.

It is not a de Polignac number, because 87022157 - 2¹⁴ = 87005773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87022151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72782 + ... + 73967.

It is an arithmetic number, because the mean of its divisors is an integer number (21792375).

Almost surely, 2^87022157 is an apocalyptic number.

It is an amenable number.

87022157 is a deficient number, since it is larger than the sum of its proper divisors (147343).

87022157 is a wasteful number, since it uses less digits than its factorization.

87022157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147342.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 87022157 is about 9328.5667173473. The cubic root of 87022157 is about 443.1423753451.

The spelling of 87022157 in words is "eighty-seven million, twenty-two thousand, one hundred fifty-seven".