2157434031087 has 12 divisors (see below), whose sum is σ = 3169112136840. Its totient is φ = 1413911568048.

The previous prime is 2157434031059. The next prime is 2157434031097. The reversal of 2157434031087 is 7801304347512.

2157434031087 is a `hidden beast` number, since 2 + 1 + 574 + 3 + 40 + 31 + 0 + 8 + 7 = 666.

It is not a de Polignac number, because 2157434031087 - 2¹¹ = 2157434029039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157434031017) 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, 2031481608 + ... + 2031482669.

It is an arithmetic number, because the mean of its divisors is an integer number (264092678070).

Almost surely, 2^{2157434031087} is an apocalyptic number.

2157434031087 is a deficient number, since it is larger than the sum of its proper divisors (1011678105753).

2157434031087 is a wasteful number, since it uses less digits than its factorization.

2157434031087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062964342 (or 4062964339 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

Adding to 2157434031087 its reverse (7801304347512), we get a palindrome (9958738378599).

The spelling of 2157434031087 in words is "two trillion, one hundred fifty-seven billion, four hundred thirty-four million, thirty-one thousand, eighty-seven".