2145656151531 has 16 divisors (see below), whose sum is σ = 3189982197120. Its totient is φ = 1425382880040.

The previous prime is 2145656151491. The next prime is 2145656151571. The reversal of 2145656151531 is 1351516565412.

2145656151531 is a `hidden beast` number, since 2 + 1 + 4 + 5 + 6 + 5 + 61 + 51 + 531 = 666.

It is an interprime number because it is at equal distance from previous prime (2145656151491) and next prime (2145656151571).

It is not a de Polignac number, because 2145656151531 - 2⁶ = 2145656151467 is a prime.

It is a super-2 number, since 2×2145656151531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2145656151571) 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, 140396505 + ... + 140411786.

It is an arithmetic number, because the mean of its divisors is an integer number (199373887320).

Almost surely, 2^{2145656151531} is an apocalyptic number.

2145656151531 is a deficient number, since it is larger than the sum of its proper divisors (1044326045589).

2145656151531 is a wasteful number, since it uses less digits than its factorization.

2145656151531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280808583 (or 280808577 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The spelling of 2145656151531 in words is "two trillion, one hundred forty-five billion, six hundred fifty-six million, one hundred fifty-one thousand, five hundred thirty-one".