2156122007547 has 16 divisors (see below), whose sum is σ = 2981059200000. Its totient is φ = 1384536337184.

The previous prime is 2156122007477. The next prime is 2156122007573. The reversal of 2156122007547 is 7457002216512.

It is a cyclic number.

It is not a de Polignac number, because 2156122007547 - 2¹⁹ = 2156121483259 is a prime.

It is a super-2 number, since 2×2156122007547² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2156122007499 and 2156122007508.

It is not an unprimeable number, because it can be changed into a prime (2156122007587) 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, 29537547 + ... + 29610452.

It is an arithmetic number, because the mean of its divisors is an integer number (186316200000).

Almost surely, 2^{2156122007547} is an apocalyptic number.

2156122007547 is a deficient number, since it is larger than the sum of its proper divisors (824937192453).

2156122007547 is a wasteful number, since it uses less digits than its factorization.

2156122007547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59148450.

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 2156122007547 in words is "two trillion, one hundred fifty-six billion, one hundred twenty-two million, seven thousand, five hundred forty-seven".