1955998151 has 4 divisors (see below), whose sum is σ = 1956197712. Its totient is φ = 1955798592.

The previous prime is 1955998141. The next prime is 1955998153. The reversal of 1955998151 is 1518995591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1518995591 = 1187 ⋅1279693.

It is a cyclic number.

It is not a de Polignac number, because 1955998151 - 2²⁶ = 1888889287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1955998093 and 1955998102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955998153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84275 + ... + 104948.

It is an arithmetic number, because the mean of its divisors is an integer number (489049428).

Almost surely, 2^1955998151 is an apocalyptic number.

1955998151 is a deficient number, since it is larger than the sum of its proper divisors (199561).

1955998151 is a wasteful number, since it uses less digits than its factorization.

1955998151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199560.

The product of its digits is 729000, while the sum is 53.

The square root of 1955998151 is about 44226.6678713194. The cubic root of 1955998151 is about 1250.6126385701.

The spelling of 1955998151 in words is "one billion, nine hundred fifty-five million, nine hundred ninety-eight thousand, one hundred fifty-one".