2151231002 has 16 divisors (see below), whose sum is σ = 3281334624. Its totient is φ = 1057470000.

The previous prime is 2151231001. The next prime is 2151231139. The reversal of 2151231002 is 2001321512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2151231001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423377 + ... + 428427.

It is an arithmetic number, because the mean of its divisors is an integer number (205083414).

Almost surely, 2^2151231002 is an apocalyptic number.

2151231002 is a deficient number, since it is larger than the sum of its proper divisors (1130103622).

2151231002 is a wasteful number, since it uses less digits than its factorization.

2151231002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8605.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2151231002 is about 46381.3648138991. The cubic root of 2151231002 is about 1290.9091605895.

Adding to 2151231002 its reverse (2001321512), we get a palindrome (4152552514).

The spelling of 2151231002 in words is "two billion, one hundred fifty-one million, two hundred thirty-one thousand, two".