245251424072021 has 16 divisors (see below), whose sum is σ = 255069490790400. Its totient is φ = 235651186234800.

The previous prime is 245251424071961. The next prime is 245251424072027. The reversal of 245251424072021 is 120270424152542.

It is a cyclic number.

It is not a de Polignac number, because 245251424072021 - 2¹⁴ = 245251424055637 is a prime.

It is a super-2 number, since 2×245251424072021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245251424072021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245251424072027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182688821 + ... + 184026378.

It is an arithmetic number, because the mean of its divisors is an integer number (15941843174400).

Almost surely, 2^{245251424072021} is an apocalyptic number.

It is an amenable number.

245251424072021 is a deficient number, since it is larger than the sum of its proper divisors (9818066718379).

245251424072021 is a wasteful number, since it uses less digits than its factorization.

245251424072021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366715496.

The product of its (nonzero) digits is 358400, while the sum is 41.

The spelling of 245251424072021 in words is "two hundred forty-five trillion, two hundred fifty-one billion, four hundred twenty-four million, seventy-two thousand, twenty-one".