981372550 has 12 divisors (see below), whose sum is σ = 1825353036. Its totient is φ = 392549000.

The previous prime is 981372541. The next prime is 981372593. The reversal of 981372550 is 55273189.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9813676 + ... + 9813775.

It is an arithmetic number, because the mean of its divisors is an integer number (152112753).

Almost surely, 2^981372550 is an apocalyptic number.

981372550 is a deficient number, since it is larger than the sum of its proper divisors (843980486).

981372550 is a wasteful number, since it uses less digits than its factorization.

981372550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19627463 (or 19627458 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 981372550 is about 31326.8662652363. The cubic root of 981372550 is about 993.7518924585.

The spelling of 981372550 in words is "nine hundred eighty-one million, three hundred seventy-two thousand, five hundred fifty".