1098211951 has 16 divisors (see below), whose sum is σ = 1235282400. Its totient is φ = 970195968.

The previous prime is 1098211949. The next prime is 1098211957. The reversal of 1098211951 is 1591128901.

It is a cyclic number.

It is not a de Polignac number, because 1098211951 - 2¹ = 1098211949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1098211951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098211957) 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, 19611 + ... + 50803.

It is an arithmetic number, because the mean of its divisors is an integer number (77205150).

Almost surely, 2^1098211951 is an apocalyptic number.

1098211951 is a deficient number, since it is larger than the sum of its proper divisors (137070449).

1098211951 is a wasteful number, since it uses less digits than its factorization.

1098211951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31338.

The product of its (nonzero) digits is 6480, while the sum is 37.

The square root of 1098211951 is about 33139.2810875553. The cubic root of 1098211951 is about 1031.7204886594.

The spelling of 1098211951 in words is "one billion, ninety-eight million, two hundred eleven thousand, nine hundred fifty-one".