51491102 has 16 divisors (see below), whose sum is σ = 87556560. Its totient is φ = 22514112.

The previous prime is 51491101. The next prime is 51491119. The reversal of 51491102 is 20119415.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51491101) 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, 51623 + ... + 52610.

It is an arithmetic number, because the mean of its divisors is an integer number (5472285).

Almost surely, 2^51491102 is an apocalyptic number.

51491102 is a deficient number, since it is larger than the sum of its proper divisors (36065458).

51491102 is a wasteful number, since it uses less digits than its factorization.

51491102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104267.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 51491102 is about 7175.7300673869. The cubic root of 51491102 is about 372.0295145581.

The spelling of 51491102 in words is "fifty-one million, four hundred ninety-one thousand, one hundred two".