51149460 has 48 divisors (see below), whose sum is σ = 145656000. Its totient is φ = 13407744.

The previous prime is 51149459. The next prime is 51149471. The reversal of 51149460 is 6494115.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3685 + ... + 10764.

It is an arithmetic number, because the mean of its divisors is an integer number (3034500).

Almost surely, 2^51149460 is an apocalyptic number.

It is an amenable number.

51149460 is an abundant number, since it is smaller than the sum of its proper divisors (94506540).

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

51149460 is a wasteful number, since it uses less digits than its factorization.

51149460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14520 (or 14518 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 51149460 is about 7151.8850661906. The cubic root of 51149460 is about 371.2048863092.

The spelling of 51149460 in words is "fifty-one million, one hundred forty-nine thousand, four hundred sixty".