87451431 has 8 divisors (see below), whose sum is σ = 118802160. Its totient is φ = 57200832.

The previous prime is 87451411. The next prime is 87451439. The reversal of 87451431 is 13415478.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87451431 - 2⁶ = 87451367 is a prime.

It is a super-2 number, since 2×87451431² = 15295505567895522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87451392 and 87451401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87451439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274846 + ... + 275163.

It is an arithmetic number, because the mean of its divisors is an integer number (14850270).

Almost surely, 2^87451431 is an apocalyptic number.

87451431 is a deficient number, since it is larger than the sum of its proper divisors (31350729).

87451431 is a wasteful number, since it uses less digits than its factorization.

87451431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550065.

The product of its digits is 13440, while the sum is 33.

The square root of 87451431 is about 9351.5469843230. The cubic root of 87451431 is about 443.8698435550.

The spelling of 87451431 in words is "eighty-seven million, four hundred fifty-one thousand, four hundred thirty-one".