51454620 has 144 divisors (see below), whose sum is σ = 180643008. Its totient is φ = 11612160.

The previous prime is 51454619. The next prime is 51454621. The reversal of 51454620 is 2645415.

It is an interprime number because it is at equal distance from previous prime (51454619) and next prime (51454621).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51454621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122010 + ... + 122430.

Almost surely, 2^51454620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51454620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90321504).

51454620 is an abundant number, since it is smaller than the sum of its proper divisors (129188388).

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

51454620 is a wasteful number, since it uses less digits than its factorization.

51454620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 51454620 is about 7173.1875759665. The cubic root of 51454620 is about 371.9416314943.

The spelling of 51454620 in words is "fifty-one million, four hundred fifty-four thousand, six hundred twenty".