51155454 has 64 divisors (see below), whose sum is σ = 121992192. Its totient is φ = 13996800.

The previous prime is 51155453. The next prime is 51155471. The reversal of 51155454 is 45455115.

It is a super-2 number, since 2×51155454² = 5233760947892232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104799 + ... + 105285.

It is an arithmetic number, because the mean of its divisors is an integer number (1906128).

Almost surely, 2^51155454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51155454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60996096).

51155454 is an abundant number, since it is smaller than the sum of its proper divisors (70836738).

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

51155454 is a wasteful number, since it uses less digits than its factorization.

51155454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601.

The product of its digits is 10000, while the sum is 30.

The square root of 51155454 is about 7152.3041042730. The cubic root of 51155454 is about 371.2193857466.

The spelling of 51155454 in words is "fifty-one million, one hundred fifty-five thousand, four hundred fifty-four".