2151522142 has 32 divisors (see below), whose sum is σ = 4260314880. Its totient is φ = 788945280.

The previous prime is 2151522137. The next prime is 2151522167. The reversal of 2151522142 is 2412251512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408292 + ... + 413527.

It is an arithmetic number, because the mean of its divisors is an integer number (133134840).

Almost surely, 2^2151522142 is an apocalyptic number.

2151522142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2151522142 is a deficient number, since it is larger than the sum of its proper divisors (2108792738).

2151522142 is a wasteful number, since it uses less digits than its factorization.

2151522142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821856.

The product of its digits is 1600, while the sum is 25.

The square root of 2151522142 is about 46384.5032527028. The cubic root of 2151522142 is about 1290.9673936569.

Adding to 2151522142 its reverse (2412251512), we get a palindrome (4563773654).

The spelling of 2151522142 in words is "two billion, one hundred fifty-one million, five hundred twenty-two thousand, one hundred forty-two".