2157207465 has 32 divisors (see below), whose sum is σ = 4152222720. Its totient is φ = 934248384.

The previous prime is 2157207463. The next prime is 2157207499. The reversal of 2157207465 is 5647027512.

It is not a de Polignac number, because 2157207465 - 2¹ = 2157207463 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2157207463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 538659 + ... + 542648.

It is an arithmetic number, because the mean of its divisors is an integer number (129756960).

Almost surely, 2^2157207465 is an apocalyptic number.

It is an amenable number.

2157207465 is a deficient number, since it is larger than the sum of its proper divisors (1995015255).

2157207465 is a wasteful number, since it uses less digits than its factorization.

2157207465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081341.

The product of its (nonzero) digits is 117600, while the sum is 39.

The square root of 2157207465 is about 46445.7475448506. The cubic root of 2157207465 is about 1292.1035057913.

The spelling of 2157207465 in words is "two billion, one hundred fifty-seven million, two hundred seven thousand, four hundred sixty-five".