2151901439 has 8 divisors (see below), whose sum is σ = 2202475968. Its totient is φ = 2101526560.

The previous prime is 2151901421. The next prime is 2151901483. The reversal of 2151901439 is 9341091512.

It is a happy number.

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 2151901439 - 2¹² = 2151897343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151901399 and 2151901408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151201439) 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, 27992 + ... + 71325.

It is an arithmetic number, because the mean of its divisors is an integer number (275309496).

Almost surely, 2^2151901439 is an apocalyptic number.

2151901439 is a deficient number, since it is larger than the sum of its proper divisors (50574529).

2151901439 is an equidigital number, since it uses as much as digits as its factorization.

2151901439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99825.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 2151901439 is about 46388.5916901990. The cubic root of 2151901439 is about 1291.0432517790.

The spelling of 2151901439 in words is "two billion, one hundred fifty-one million, nine hundred one thousand, four hundred thirty-nine".