265235520220551 has 12 divisors (see below), whose sum is σ = 383118160173840. Its totient is φ = 176823594060000.

The previous prime is 265235520220549. The next prime is 265235520220553. The reversal of 265235520220551 is 155022025532562.

265235520220551 is a `hidden beast` number, since 2 + 6 + 5 + 2 + 3 + 55 + 20 + 2 + 20 + 551 = 666.

It is an interprime number because it is at equal distance from previous prime (265235520220549) and next prime (265235520220553).

It is not a de Polignac number, because 265235520220551 - 2¹ = 265235520220549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 265235520220497 and 265235520220506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265235520220553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16424926 + ... + 28288676.

It is an arithmetic number, because the mean of its divisors is an integer number (31926513347820).

Almost surely, 2^{265235520220551} is an apocalyptic number.

265235520220551 is a deficient number, since it is larger than the sum of its proper divisors (117882639953289).

265235520220551 is a wasteful number, since it uses less digits than its factorization.

265235520220551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14347846 (or 14347843 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 45.

The spelling of 265235520220551 in words is "two hundred sixty-five trillion, two hundred thirty-five billion, five hundred twenty million, two hundred twenty thousand, five hundred fifty-one".