621054243 has 8 divisors (see below), whose sum is σ = 920080400. Its totient is φ = 414036144.

The previous prime is 621054241. The next prime is 621054281. The reversal of 621054243 is 342450126.

It is not a de Polignac number, because 621054243 - 2¹ = 621054241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 23002009 = 621054243 / (6 + 2 + 1 + 0 + 5 + 4 + 2 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621054241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11500978 + ... + 11501031.

It is an arithmetic number, because the mean of its divisors is an integer number (115010050).

Almost surely, 2^621054243 is an apocalyptic number.

621054243 is a deficient number, since it is larger than the sum of its proper divisors (299026157).

621054243 is a wasteful number, since it uses less digits than its factorization.

621054243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23002018 (or 23002012 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 621054243 is about 24920.9599132939. The cubic root of 621054243 is about 853.1849337921.

The spelling of 621054243 in words is "six hundred twenty-one million, fifty-four thousand, two hundred forty-three".