2151531254 has 32 divisors (see below), whose sum is σ = 3538080000. Its totient is φ = 976849920.

The previous prime is 2151531227. The next prime is 2151531289. The reversal of 2151531254 is 4521351512.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364922 + ... + 370770.

It is an arithmetic number, because the mean of its divisors is an integer number (110565000).

Almost surely, 2^2151531254 is an apocalyptic number.

2151531254 is a deficient number, since it is larger than the sum of its proper divisors (1386548746).

2151531254 is a wasteful number, since it uses less digits than its factorization.

2151531254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6248.

The product of its digits is 6000, while the sum is 29.

The square root of 2151531254 is about 46384.6014750585. The cubic root of 2151531254 is about 1290.9692161307.

Adding to 2151531254 its reverse (4521351512), we get a palindrome (6672882766).

The spelling of 2151531254 in words is "two billion, one hundred fifty-one million, five hundred thirty-one thousand, two hundred fifty-four".