245317031421 has 48 divisors (see below), whose sum is σ = 439498509120. Its totient is φ = 119941086720.

The previous prime is 245317031413. The next prime is 245317031431. The reversal of 245317031421 is 124130713542.

It is not a de Polignac number, because 245317031421 - 2³ = 245317031413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245317031431) 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, 4434606 + ... + 4489583.

It is an arithmetic number, because the mean of its divisors is an integer number (9156218940).

Almost surely, 2^245317031421 is an apocalyptic number.

245317031421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

245317031421 is a deficient number, since it is larger than the sum of its proper divisors (194181477699).

245317031421 is a wasteful number, since it uses less digits than its factorization.

245317031421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8924234 (or 8924227 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

Adding to 245317031421 its reverse (124130713542), we get a palindrome (369447744963).

The spelling of 245317031421 in words is "two hundred forty-five billion, three hundred seventeen million, thirty-one thousand, four hundred twenty-one".