2145497972 has 12 divisors (see below), whose sum is σ = 3875738496. Its totient is φ = 1038144120.

The previous prime is 2145497863. The next prime is 2145497987. The reversal of 2145497972 is 2797945412.

It is a happy number.

It is a super-2 number, since 2×2145497972² = 9206323095712225568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2145497972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8651078 + ... + 8651325.

It is an arithmetic number, because the mean of its divisors is an integer number (322978208).

Almost surely, 2^2145497972 is an apocalyptic number.

It is an amenable number.

2145497972 is a deficient number, since it is larger than the sum of its proper divisors (1730240524).

2145497972 is a wasteful number, since it uses less digits than its factorization.

2145497972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17302438 (or 17302436 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 50.

The square root of 2145497972 is about 46319.5204206607. The cubic root of 2145497972 is about 1289.7613828622.

The spelling of 2145497972 in words is "two billion, one hundred forty-five million, four hundred ninety-seven thousand, nine hundred seventy-two".