2251501997 has 8 divisors (see below), whose sum is σ = 2262879936. Its totient is φ = 2240137312.

The previous prime is 2251501991. The next prime is 2251502023. The reversal of 2251501997 is 7991051522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2251501997 - 2⁶ = 2251501933 is a prime.

It is a super-2 number, since 2×2251501997² = 10138522484989976018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251501991) 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, 595808 + ... + 599574.

It is an arithmetic number, because the mean of its divisors is an integer number (282859992).

Almost surely, 2^2251501997 is an apocalyptic number.

It is an amenable number.

2251501997 is a deficient number, since it is larger than the sum of its proper divisors (11377939).

2251501997 is a wasteful number, since it uses less digits than its factorization.

2251501997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6627.

The product of its (nonzero) digits is 56700, while the sum is 41.

The square root of 2251501997 is about 47449.9946996836. The cubic root of 2251501997 is about 1310.6622134103.

The spelling of 2251501997 in words is "two billion, two hundred fifty-one million, five hundred one thousand, nine hundred ninety-seven".