51231099 has 8 divisors (see below), whose sum is σ = 69974352. Its totient is φ = 33320960.

The previous prime is 51231083. The next prime is 51231101. The reversal of 51231099 is 99013215.

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 51231099 - 2⁴ = 51231083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51231799) 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, 208134 + ... + 208379.

It is an arithmetic number, because the mean of its divisors is an integer number (8746794).

Almost surely, 2^51231099 is an apocalyptic number.

51231099 is a deficient number, since it is larger than the sum of its proper divisors (18743253).

51231099 is a wasteful number, since it uses less digits than its factorization.

51231099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416557.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 51231099 is about 7157.5903068002. The cubic root of 51231099 is about 371.4022731240.

The spelling of 51231099 in words is "fifty-one million, two hundred thirty-one thousand, ninety-nine".