621054143335431 has 48 divisors (see below), whose sum is σ = 1020138745647840. Its totient is φ = 360929867639040.

The previous prime is 621054143335421. The next prime is 621054143335441. The reversal of 621054143335431 is 134533341450126.

621054143335431 is a `hidden beast` number, since 6 + 2 + 1 + 0 + 541 + 4 + 33 + 35 + 43 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (621054143335421) and next prime (621054143335441).

It is not a de Polignac number, because 621054143335431 - 2⁵ = 621054143335399 is a prime.

It is a super-2 number, since 2×621054143335431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621054143335421) 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, 439952380 + ... + 441361761.

It is an arithmetic number, because the mean of its divisors is an integer number (21252890534330).

Almost surely, 2^{621054143335431} is an apocalyptic number.

621054143335431 is a deficient number, since it is larger than the sum of its proper divisors (399084602312409).

621054143335431 is a wasteful number, since it uses less digits than its factorization.

621054143335431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881314496 (or 881314493 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

Adding to 621054143335431 its reverse (134533341450126), we get a palindrome (755587484785557).

The spelling of 621054143335431 in words is "six hundred twenty-one trillion, fifty-four billion, one hundred forty-three million, three hundred thirty-five thousand, four hundred thirty-one".