551751990 has 32 divisors (see below), whose sum is σ = 1327726080. Its totient is φ = 146742624.

The previous prime is 551751989. The next prime is 551751997. The reversal of 551751990 is 99157155.

551751990 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551751997) 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, 12894 + ... + 35633.

It is an arithmetic number, because the mean of its divisors is an integer number (41491440).

Almost surely, 2^551751990 is an apocalyptic number.

551751990 is an abundant number, since it is smaller than the sum of its proper divisors (775974090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551751990 is a wasteful number, since it uses less digits than its factorization.

551751990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48916.

The product of its (nonzero) digits is 70875, while the sum is 42.

The square root of 551751990 is about 23489.4016526603. The cubic root of 551751990 is about 820.1903137485.

The spelling of 551751990 in words is "five hundred fifty-one million, seven hundred fifty-one thousand, nine hundred ninety".