621331426 has 16 divisors (see below), whose sum is σ = 981540000. Its totient is φ = 294167808.

The previous prime is 621331423. The next prime is 621331427. The reversal of 621331426 is 624133126.

It is a junction number, because it is equal to n+sod(n) for n = 621331394 and 621331403.

It is not an unprimeable number, because it can be changed into a prime (621331423) 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, 130626 + ... + 135298.

It is an arithmetic number, because the mean of its divisors is an integer number (61346250).

Almost surely, 2^621331426 is an apocalyptic number.

621331426 is a deficient number, since it is larger than the sum of its proper divisors (360208574).

621331426 is a wasteful number, since it uses less digits than its factorization.

621331426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193.

The product of its digits is 5184, while the sum is 28.

The square root of 621331426 is about 24926.5205353655. The cubic root of 621331426 is about 853.3118433648.

The spelling of 621331426 in words is "six hundred twenty-one million, three hundred thirty-one thousand, four hundred twenty-six".