621331053 has 8 divisors (see below), whose sum is σ = 946790208. Its totient is φ = 355046304.

The previous prime is 621331049. The next prime is 621331069. The reversal of 621331053 is 350133126.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621331053 - 2² = 621331049 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621331013) 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, 14793576 + ... + 14793617.

It is an arithmetic number, because the mean of its divisors is an integer number (118348776).

Almost surely, 2^621331053 is an apocalyptic number.

It is an amenable number.

621331053 is a deficient number, since it is larger than the sum of its proper divisors (325459155).

621331053 is a wasteful number, since it uses less digits than its factorization.

621331053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29587203.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 621331053 is about 24926.5130533735. The cubic root of 621331053 is about 853.3116726103.

Adding to 621331053 its reverse (350133126), we get a palindrome (971464179).

The spelling of 621331053 in words is "six hundred twenty-one million, three hundred thirty-one thousand, fifty-three".