2161252526 has 4 divisors (see below), whose sum is σ = 3241878792. Its totient is φ = 1080626262.

The previous prime is 2161252519. The next prime is 2161252529. The reversal of 2161252526 is 6252521612.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2161252526² = 9342024962282761352, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2161252492 and 2161252501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161252529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540313130 + ... + 540313133.

It is an arithmetic number, because the mean of its divisors is an integer number (810469698).

Almost surely, 2^2161252526 is an apocalyptic number.

2161252526 is a deficient number, since it is larger than the sum of its proper divisors (1080626266).

2161252526 is a wasteful number, since it uses less digits than its factorization.

2161252526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080626265.

The product of its digits is 14400, while the sum is 32.

The square root of 2161252526 is about 46489.2732358767. The cubic root of 2161252526 is about 1292.9106255043.

The spelling of 2161252526 in words is "two billion, one hundred sixty-one million, two hundred fifty-two thousand, five hundred twenty-six".