51453996 has 48 divisors (see below), whose sum is σ = 131580288. Its totient is φ = 15520000.

The previous prime is 51453991. The next prime is 51454001. The reversal of 51453996 is 69935415.

It is an interprime number because it is at equal distance from previous prime (51453991) and next prime (51454001).

It is a super-3 number, since 3×51453996³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51453991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32356 + ... + 33908.

It is an arithmetic number, because the mean of its divisors is an integer number (2741256).

Almost surely, 2^51453996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51453996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65790144).

51453996 is an abundant number, since it is smaller than the sum of its proper divisors (80126292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51453996 is a wasteful number, since it uses less digits than its factorization.

51453996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1820 counting only the distinct ones).

The product of its digits is 145800, while the sum is 42.

The square root of 51453996 is about 7173.1440805270. The cubic root of 51453996 is about 371.9401279525.

The spelling of 51453996 in words is "fifty-one million, four hundred fifty-three thousand, nine hundred ninety-six".