920342251 has 4 divisors (see below), whose sum is σ = 920408832. Its totient is φ = 920275672.

The previous prime is 920342249. The next prime is 920342261. The reversal of 920342251 is 152243029.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 152243029 = 19 ⋅8012791.

It is a cyclic number.

It is not a de Polignac number, because 920342251 - 2¹ = 920342249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920342261) 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, 3916 + ... + 43081.

It is an arithmetic number, because the mean of its divisors is an integer number (230102208).

Almost surely, 2^920342251 is an apocalyptic number.

920342251 is a deficient number, since it is larger than the sum of its proper divisors (66581).

920342251 is a wasteful number, since it uses less digits than its factorization.

920342251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66580.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 920342251 is about 30337.1430922557. The cubic root of 920342251 is about 972.7094161572.

The spelling of 920342251 in words is "nine hundred twenty million, three hundred forty-two thousand, two hundred fifty-one".