921738550 has 24 divisors (see below), whose sum is σ = 1715695992. Its totient is φ = 368424000.

The previous prime is 921738527. The next prime is 921738551. The reversal of 921738550 is 55837129.

It is a super-2 number, since 2×921738550² = 1699203909112205000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921738551) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 70530 + ... + 82570.

It is an arithmetic number, because the mean of its divisors is an integer number (71487333).

Almost surely, 2^921738550 is an apocalyptic number.

921738550 is a deficient number, since it is larger than the sum of its proper divisors (793957442).

921738550 is a wasteful number, since it uses less digits than its factorization.

921738550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13584 (or 13579 counting only the distinct ones).

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

The square root of 921738550 is about 30360.1473975342. The cubic root of 921738550 is about 973.2010835777.

The spelling of 921738550 in words is "nine hundred twenty-one million, seven hundred thirty-eight thousand, five hundred fifty".