98551631 has 6 divisors (see below), whose sum is σ = 99821232. Its totient is φ = 97297980.

The previous prime is 98551597. The next prime is 98551633. The reversal of 98551631 is 13615589.

It is a de Polignac number, because none of the positive numbers 2^k-98551631 is a prime.

It is a super-2 number, since 2×98551631² = 19424847945520322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98551633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1655 + ... + 14136.

It is an arithmetic number, because the mean of its divisors is an integer number (16636872).

Almost surely, 2^98551631 is an apocalyptic number.

98551631 is a deficient number, since it is larger than the sum of its proper divisors (1269601).

98551631 is an equidigital number, since it uses as much as digits as its factorization.

98551631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15949 (or 15870 counting only the distinct ones).

The product of its digits is 32400, while the sum is 38.

The square root of 98551631 is about 9927.3174120706. The cubic root of 98551631 is about 461.9070654444.

The spelling of 98551631 in words is "ninety-eight million, five hundred fifty-one thousand, six hundred thirty-one".