851451951 has 32 divisors (see below), whose sum is σ = 1338163200. Its totient is φ = 471512160.

The previous prime is 851451941. The next prime is 851451971. The reversal of 851451951 is 159154158.

It is a happy number.

It is not a de Polignac number, because 851451951 - 2⁷ = 851451823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851451911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83130 + ... + 92808.

It is an arithmetic number, because the mean of its divisors is an integer number (41817600).

Almost surely, 2^851451951 is an apocalyptic number.

851451951 is a deficient number, since it is larger than the sum of its proper divisors (486711249).

851451951 is a wasteful number, since it uses less digits than its factorization.

851451951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9819.

The product of its digits is 36000, while the sum is 39.

The square root of 851451951 is about 29179.6496037907. The cubic root of 851451951 is about 947.8072978414.

The spelling of 851451951 in words is "eight hundred fifty-one million, four hundred fifty-one thousand, nine hundred fifty-one".