551401536 has 112 divisors (see below), whose sum is σ = 1687762944. Its totient is φ = 155613696.

The previous prime is 551401531. The next prime is 551401541. The reversal of 551401536 is 635104155.

It is an interprime number because it is at equal distance from previous prime (551401531) and next prime (551401541).

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (551401531) 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, 109081 + ... + 114023.

It is an arithmetic number, because the mean of its divisors is an integer number (15069312).

Almost surely, 2^551401536 is an apocalyptic number.

551401536 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551401536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843881472).

551401536 is an abundant number, since it is smaller than the sum of its proper divisors (1136361408).

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

551401536 is a wasteful number, since it uses less digits than its factorization.

551401536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5048 (or 5038 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 551401536 is about 23481.9406353053. The cubic root of 551401536 is about 820.0166246877.

The spelling of 551401536 in words is "five hundred fifty-one million, four hundred one thousand, five hundred thirty-six".