551201501 has 4 divisors (see below), whose sum is σ = 552382272. Its totient is φ = 550020732.

The previous prime is 551201467. The next prime is 551201503. The reversal of 551201501 is 105102155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 105102155 = 5 ⋅21020431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551201501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551201503) 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, 589685 + ... + 590618.

It is an arithmetic number, because the mean of its divisors is an integer number (138095568).

Almost surely, 2^551201501 is an apocalyptic number.

It is an amenable number.

551201501 is a deficient number, since it is larger than the sum of its proper divisors (1180771).

551201501 is a wasteful number, since it uses less digits than its factorization.

551201501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180770.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 551201501 is about 23477.6809118788. The cubic root of 551201501 is about 819.9174520314.

Adding to 551201501 its reverse (105102155), we get a palindrome (656303656).

The spelling of 551201501 in words is "five hundred fifty-one million, two hundred one thousand, five hundred one".