2145213402 has 16 divisors (see below), whose sum is σ = 4291025760. Its totient is φ = 714971312.

The previous prime is 2145213401. The next prime is 2145213403. The reversal of 2145213402 is 2043125412.

It is an interprime number because it is at equal distance from previous prime (2145213401) and next prime (2145213403).

It is not an unprimeable number, because it can be changed into a prime (2145213401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31393 + ... + 72635.

It is an arithmetic number, because the mean of its divisors is an integer number (268189110).

Almost surely, 2^2145213402 is an apocalyptic number.

2145213402 is an abundant number, since it is smaller than the sum of its proper divisors (2145812358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145213402 is a wasteful number, since it uses less digits than its factorization.

2145213402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49917.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2145213402 is about 46316.4485037443. The cubic root of 2145213402 is about 1289.7043574646.

Adding to 2145213402 its reverse (2043125412), we get a palindrome (4188338814).

The spelling of 2145213402 in words is "two billion, one hundred forty-five million, two hundred thirteen thousand, four hundred two".