2145431502 has 32 divisors (see below), whose sum is σ = 4772364960. Its totient is φ = 714432960.

The previous prime is 2145431489. The next prime is 2145431507. The reversal of 2145431502 is 2051345412.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145431507) 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, 36552 + ... + 75012.

It is an arithmetic number, because the mean of its divisors is an integer number (149136405).

Almost surely, 2^2145431502 is an apocalyptic number.

2145431502 is an abundant number, since it is smaller than the sum of its proper divisors (2626933458).

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

2145431502 is a wasteful number, since it uses less digits than its factorization.

2145431502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39505 (or 39499 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 2145431502 is about 46318.8028990387. The cubic root of 2145431502 is about 1289.7480632933.

Adding to 2145431502 its reverse (2051345412), we get a palindrome (4196776914).

The spelling of 2145431502 in words is "two billion, one hundred forty-five million, four hundred thirty-one thousand, five hundred two".