551950 has 48 divisors (see below), whose sum is σ = 1249920. Its totient is φ = 177120.

The previous prime is 551933. The next prime is 551951. The reversal of 551950 is 59155.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6609 + ... + 6691.

It is an arithmetic number, because the mean of its divisors is an integer number (26040).

2⁵⁵¹⁹⁵⁰ is an apocalyptic number.

551950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

551950 is an abundant number, since it is smaller than the sum of its proper divisors (697970).

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

551950 is a wasteful number, since it uses less digits than its factorization.

551950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 551950 is about 742.9333752094. The cubic root of 551950 is about 82.0288417282.

The spelling of 551950 in words is "five hundred fifty-one thousand, nine hundred fifty".