245154223521 has 6 divisors (see below), whose sum is σ = 354111656210. Its totient is φ = 163436149008.

The previous prime is 245154223507. The next prime is 245154223541. The reversal of 245154223521 is 125322451542.

245154223521 is a `hidden beast` number, since 2 + 45 + 1 + 542 + 23 + 52 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 242433140625 + 2721082896 = 492375^2 + 52164^2 .

It is not a de Polignac number, because 245154223521 - 2¹³ = 245154215329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245154223541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13619679076 + ... + 13619679093.

Almost surely, 2^245154223521 is an apocalyptic number.

It is an amenable number.

245154223521 is a deficient number, since it is larger than the sum of its proper divisors (108957432689).

245154223521 is a wasteful number, since it uses less digits than its factorization.

245154223521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27239358175 (or 27239358172 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The spelling of 245154223521 in words is "two hundred forty-five billion, one hundred fifty-four million, two hundred twenty-three thousand, five hundred twenty-one".