998511051 has 16 divisors (see below), whose sum is σ = 1341680384. Its totient is φ = 660520224.

The previous prime is 998511037. The next prime is 998511071. The reversal of 998511051 is 150115899.

It is not a de Polignac number, because 998511051 - 2¹¹ = 998509003 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998511001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612900 + ... + 614526.

It is an arithmetic number, because the mean of its divisors is an integer number (83855024).

Almost surely, 2^998511051 is an apocalyptic number.

998511051 is a deficient number, since it is larger than the sum of its proper divisors (343169333).

998511051 is a wasteful number, since it uses less digits than its factorization.

With its successor (998511052) it forms an eRAP, since the sums of their prime factors are consecutive (3090 and 3091).

998511051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090.

The product of its (nonzero) digits is 16200, while the sum is 39.

The square root of 998511051 is about 31599.2254810146. The cubic root of 998511051 is about 999.5034371328.

The spelling of 998511051 in words is "nine hundred ninety-eight million, five hundred eleven thousand, fifty-one".