2151226490436 has 27 divisors (see below), whose sum is σ = 5437844762623. Its totient is φ = 717072563400.

The previous prime is 2151226490423. The next prime is 2151226490437. The reversal of 2151226490436 is 6340946221512.

The square root of 2151226490436 is 1466706.

It is a perfect power (a square), and thus also a powerful number.

2151226490436 is a `hidden beast` number, since 2 + 1 + 5 + 122 + 6 + 4 + 90 + 436 = 666.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151226490391 and 2151226490400.

It is not an unprimeable number, because it can be changed into a prime (2151226490437) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8678011 + ... + 8922461.

Almost surely, 2^{2151226490436} is an apocalyptic number.

2151226490436 is the 1466706-th square number.

It is an amenable number.

2151226490436 is an abundant number, since it is smaller than the sum of its proper divisors (3286618272187).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2151226490436 is an frugal number, since it uses more digits than its factorization.

2151226490436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488912 (or 244456 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 2151226490436 in words is "two trillion, one hundred fifty-one billion, two hundred twenty-six million, four hundred ninety thousand, four hundred thirty-six".