2161252246154 has 8 divisors (see below), whose sum is σ = 3245016686340. Its totient is φ = 1079580017376.

The previous prime is 2161252246147. The next prime is 2161252246193. The reversal of 2161252246154 is 4516422521612.

It can be written as a sum of positive squares in 2 ways, for example, as 2068784558929 + 92467687225 = 1438327^2 + 304085^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2161252246154² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523050269 + ... + 523054400.

Almost surely, 2^{2161252246154} is an apocalyptic number.

2161252246154 is a deficient number, since it is larger than the sum of its proper divisors (1083764440186).

2161252246154 is a wasteful number, since it uses less digits than its factorization.

2161252246154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046105704.

The product of its digits is 230400, while the sum is 41.

Adding to 2161252246154 its reverse (4516422521612), we get a palindrome (6677674767766).

The spelling of 2161252246154 in words is "two trillion, one hundred sixty-one billion, two hundred fifty-two million, two hundred forty-six thousand, one hundred fifty-four".